Susobhan Das

@chimpoly.ulb.be

Postdoctoral Research Associate, Chemistry
Université libre de Bruxelles ( ULB ), Belgium

Susobhan Das


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https://researchid.co/das93researcherid

EDUCATION

Doctorate in Chemistry

RESEARCH, TEACHING, or OTHER INTERESTS

Organic Chemistry, Materials Science, Pharmaceutical Science, Materials Chemistry
18

Scopus Publications

852

Scholar Citations

10

Scholar h-index

12

Scholar i10-index

Scopus Publications

  • Isomorphism in a Series of Five Homologous Compounds
    Anmol Andotra, Susobhan Das, C. Elizabeth Killalea, Ferdinando Malagreca, Caterina Zuffa, Priya Pandey, Shehzad Khan, Jun Liu, Roland C. Fischer, Andrew S. Dunn, Ryusei Oketani, Lucia Maini, Roland Resel, Yves H. Geerts
    Crystal Growth and Design, 2026
    High Resolution Image Download MS PowerPoint Slide This study examines the relationship between molecular structure and crystal packing in organic crystals of homologous compounds, with an emphasis on isomorphism─the ability of a series of molecules to maintain the same space group and homothetic unit cell when they crystallize despite variations in chemical composition. This phenomenon challenges the conventional view that distinct molecular structures lead to diverse crystalline forms, particularly for chiral molecules, where the interplay between chirality and molecular symmetry within crystal lattices remains poorly understood. Herein, we present the first structurally consistent series of five m -Y-phenyl- N,N -diisopropylglyoxylamide derivatives (Y = H, F, Cl, Br, or I), exemplifying a rare case of isomorphism within a homologous set of achiral molecules in solution that crystallize as conglomerates by adopting a twisted chiral conformation. These enantiomorphic crystals were manually resolved using Pasteur’s method, enabling direct investigation of symmetry breaking at the morphological level. Continuous chirality measures quantitatively confirm consistent chiral behavior at both the molecular and crystalline levels, while the unit cell similarity index further validates the isomorphic nature of the series. Thermal analyses reveal systematic trends in stability across the series, while crystallographic studies demonstrate the persistence of packing motifs and supramolecular chirality. Overall, this work introduces a rare class of chiral molecular materials derived from chemically distinct achiral molecules that exhibit isomorphic molecular packing. These systems are broadly relevant to fields ranging from pharmaceuticals to functional materials, where small variations in the solid-state structure can lead to substantial differences in performance.
  • Boric acid as supramolecular graphite
    Susobhan Das, Khushboo Yadava, C. Malla Reddy, Subhankar Saha
    Chemical Communications, 2025
    Lubrication in molecular crystals.
  • Control of Polymorphism and Alignment in Photochromic Salicylideneaniline Crystals Grown by Directional Crystallization
    Yuki Hagiwara, Guillaume Schweicher, Susobhan Das, Shodai Hasebe, Toru Asahi, Hideko Koshima, Yves Henri Geerts
    Crystal Growth and Design, 2025
    Molecular crystals hold potential applications in soft and flexible devices because of their periodic arrangements, flexibility to design, lightweight, and tunable supramolecular connections. Their rich polymorphism offers the additional advantage that the properties of different crystal forms can be studied for a given molecular structure. This study focuses on the directional crystallization of salicylideneaniline to control its polymorphic α and β forms. We discovered that upon directional crystallization from nonground β crystals, the metastable α form was yielded with well-aligned crystal habits. In contrast, by grinding β crystals before directional crystallization, the stable β form was surprisingly produced. These polymorphs were determined using X-ray diffraction, and their differences in photochromic behaviors have been investigated. This study confirms directional crystallization as a novel approach to polymorphic control. It provides a promising method for fabricating well-aligned, shape-specific, and desired polymorphic crystalline materials suitable for device fabrication.
  • On the importance of crystal structures for organic thin film transistors
    Guillaume Schweicher, Susobhan Das, Roland Resel, Yves Geerts
    Acta Crystallographica Section C Structural Chemistry, 2024
    Historically, knowledge of the molecular packing within the crystal structures of organic semiconductors has been instrumental in understanding their solid-state electronic properties. Nowadays, crystal structures are thus becoming increasingly important for enabling engineering properties, understanding polymorphism in bulk and in thin films, exploring dynamics and elucidating phase-transition mechanisms. This review article introduces the most salient and recent results of the field.
  • Gas Release as an Efficient Strategy to Tune Mechanical Properties and Thermoresponsiveness of Dynamic Molecular Crystals
    Susobhan Das, Luca Catalano, Yves Geerts
    Small, 2024
    Dynamic molecular crystals combining multiple and finely tunable functionalities are attracting and an increasing attention due to their potential applications in a broad range of fields as efficient energy transducers and stimuli‐responsive materials. In this context, a multicomponent organic salt, piperazinium trifluoroacetate (PZTFA), endowed with an unusual multidimensional responsive landscape is reported. Crystals of the salt undergo smooth plastic deformation under mechanical stress and thermo‐induced jumping. Furthermore, via controlled crystal bending and release of trifluoroacetic acid from the lattice, which is anticipated from the design of the material, both the mechanical response and the thermoresponsive behavior are efficiently tuned while partially preserving the crystallinity of the system. In particular, mechanical deformation hampers guest release and hence the macroscopic jumping effect, while trifluoroacetic acid release stiffens the crystals. These complex adaptive responses establish a new crystal engineering strategy to gain further control over dynamic organic crystals.
  • Exceptional Thermo-Mechano-Fluorochromism and Nanomechanical Analysis of Mechanically Responsive J and H Type Polymorphic Systems
    Poonam Deka, Susobhan Das, Parishmita Sarma, Kalyan J. Kalita, Ratheesh K. Vijayaraghavan, C. Malla Reddy, Ranjit Thakuria
    Crystal Growth and Design, 2024
    Mechanically responsive organic crystals with thermo-mechano-fluorochromic behavior are relatively scarce. A polymorphic J and H aggregate system with such mechanosalient properties has potential importance for the understanding of structure-mechanochromic luminescence. Herein, we not only carefully investigated the nanomechanical properties of a polymorphic organic fluorophore of (biphenyl-4-ylmethylidene) propanedinitrile but also demonstrated their exceptional thermo-mechanochromic luminescence. Both the polymorphs were characterized using single crystal X-ray diffraction, solid-state UV, SSFL, nanoindentation, Hirshfeld surfaces, energy frameworks, powder X-ray diffraction, and differential scanning calorimetry thermograms. Relatively weak π–π stacking interactions present in the crystal structures govern the hypsochromic shift on mechanical grinding. Density functional theory calculations provide tremendous support to shed light on the origin of the distinct photophysical properties of the two polymorphs.
  • Tris chelated meridional isomers of Co(III) complexes: Synthesis, crystal structure, protein binding, cytotoxicity studies and DFT/TDDFT calculation
    Dama Saren, Susobhan Das, Aparup Paul, Sharad S. Tat, Manas Kumar Santra, Tapan Kumar Si, Horst Puschmann, Subal Chandra Manna
    Inorganica Chimica Acta, 2023
  • Heparin-Induced Dual Mode Luminescence Modulation of Organic Nanoparticles and Efficient Energy Transfer
    Rakesh Biswas, Susobhan Das, Horst Puschmann, Supratim Banerjee
    Chemistry an Asian Journal, 2023
    Amphiphilic di‐cationic fumaronitrile derivatives with peripheral n‐alkyl chains formed organic nanoparticles (NPs) through self‐assembly in aqueous media. The NPs exhibited enhanced luminescence in both steady‐state and delayed mode in comparison to their molecularly dissolved state. Due to the presence of the multivalent array of positive charges on their surface, they were found to bind heparin, a bio‐polyanion which is routinely employed during surgery as an anticoagulant. The electrostatically driven co‐assemblies resulted in a significant enhancement in the steady‐state and delayed luminescence of the NPs. This provided a highly sensitive detection of the polyanion in aqueous buffer as well as in highly competitive serum and plasma media. Furthermore, and most notably, the heparin based co‐assemblies were found to act as efficient donors exhibiting fluorescence resonance energy transfer (FRET) to acceptor dyes with the energy transfer efficiency reaching up to 88%.
  • Non-stoichiometric carbamazepine cocrystal hydrates of 3,4-/3,5-dihydroxybenzoic acids: coformer-water exchange
    Trishna Rajbongshi, Kashyap Kumar Sarmah, Susobhan Das, Poonam Deka, Arijit Saha, Binoy K. Saha, Horst Puschmann, C. Malla Reddy, Ranjit Thakuria
    Chemical Communications, 2023
    A unique set of carbamazepine (CBZ) non-stoichiometric cocrystal hydrates with 34/35DHBA have been synthesized which are facilitated by their isostructural nature with the CBZ dihydrate, resulting in coformer–water exchange (molecular alloy).
  • Elastic organic semiconducting single crystals for durable all-flexible field-effect transistors: insights into the bending mechanism
    Ranita Samanta, Susobhan Das, Saikat Mondal, Tamador Alkhidir, Sharmarke Mohamed, Satyaprasad P. Senanayak, C. Malla Reddy
    Chemical Science, 2022
    Comparing flexible electronic devices containing either elastic or brittle organic semiconducting crystals led to superior stress tolerance and retention of the field-effect mobility (μFET) for devices containing elastically bendable organic crystals.
  • Viscoelastic Covalent Organic Nanotube Fabric via Macroscopic Entanglement
    Kalipada Koner, Susobhan Das, Shibani Mohata, Nghia Tuan Duong, Yusuke Nishiyama, Sharath Kandambeth, Suvendu Karak, C. Malla Reddy, Rahul Banerjee
    Journal of the American Chemical Society, 2022
  • Temperature-Reliant Dynamic Properties and Elasto-Plastic to Plastic Crystal (Rotator) Phase Transition in a Metal Oxyacid Salt
    Susobhan Das, Subhankar Saha, Mrinmay Sahu, Amit Mondal, C. Malla Reddy
    Angewandte Chemie International Edition, 2022
  • Elastic orange emissive single crystals of 1,3-diamino-2,4,5,6-tetrabromobenzene as flexible optical waveguides
    Venkatesh Gude, Priyanka S. Choubey, Susobhan Das, Shivakiran Bhaktha B. N., C. Malla Reddy, Kumar Biradha
    Journal of Materials Chemistry C, 2021
  • Autonomous self-repair in piezoelectric molecular crystals
    Surojit Bhunia, Shubham Chandel, Sumanta Kumar Karan, Somnath Dey, Akash Tiwari, Susobhan Das, Nishkarsh Kumar, Rituparno Chowdhury, Saikat Mondal, Ishita Ghosh, Amit Mondal, Bhanu Bhusan Khatua, Nirmalya Ghosh, C. Malla Reddy
    Science, 2021
  • Harnessing molecular rotations in plastic crystals: A holistic view for crystal engineering of adaptive soft materials
    Susobhan Das, Amit Mondal, C. Malla Reddy
    Chemical Society Reviews, 2020
  • Metal-like Ductility in Organic Plastic Crystals: Role of Molecular Shape and Dihydrogen Bonding Interactions in Aminoboranes
    Amit Mondal, Biswajit Bhattacharya, Susobhan Das, Surojit Bhunia, Rituparno Chowdhury, Somnath Dey, C. Malla Reddy
    Angewandte Chemie International Edition, 2020
  • Screening, crystal structures and solubility studies of a series of multidrug salt hydrates and cocrystals of fenamic acids with trimethoprim and sulfamethazine
    Biswajit Bhattacharya, Susobhan Das, Garima Lal, Saundray Raj Soni, Animesh Ghosh, C. Malla Reddy, Soumyajit Ghosh
    Journal of Molecular Structure, 2020
  • Multidrug salt forms of norfloxacin with non-steroidal anti-inflammatory drugs: Solubility and membrane permeability studies
    Biswajit Bhattacharya, Amit Mondal, Saundray Raj Soni, Susobhan Das, Surojit Bhunia, K. Bal Raju, Animesh Ghosh, C. Malla Reddy
    Crystengcomm, 2018

RECENT SCHOLAR PUBLICATIONS

  • Isomorphism in a Series of Five Homologous Compounds
    A Andotra, S Das, CE Killalea, F Malagreca, C Zuffa, P Pandey, S Khan, ...
    Crystal Growth & Design , 2026
    2026
  • Control of Polymorphism and Alignment in Photochromic Salicylideneaniline Crystals Grown by Directional Crystallization
    Y Hagiwara, G Schweicher, S Das, S Hasebe, T Asahi, H Koshima, ...
    Crystal Growth & Design 25 (7), 2090-2098 , 2025
    2025
  • Boric acid as supramolecular graphite
    S Das, K Yadava, CM Reddy, S Saha
    Chemical Communications 61 (90), 17649-17652 , 2025
    2025
    Citations: 2
  • Plasticization of a stiff pharmaceutical solid for better tabletability via cocrystallization: Shape synthons as supramolecular protecting groups
    A Mondal, B Bhattacharya, H Chen, S Khazaei, S Das, S Bhunia, S Dey, ...
    Chemical Engineering Research and Design 210, 506-512 , 2024
    2024
    Citations: 2
  • On the importance of crystal structures for organic thin film transistors
    G Schweicher, S Das, R Resel, Y Geerts
    Crystal Structure Communications 80 (10) , 2024
    2024
    Citations: 7
  • Gas release as an efficient strategy to tune mechanical properties and thermoresponsiveness of dynamic molecular crystals
    S Das, L Catalano, Y Geerts
    Small 20 (34), 2401317 , 2024
    2024
    Citations: 12
  • Exceptional Thermo-Mechano-Fluorochromism and Nanomechanical Analysis of Mechanically Responsive J and H Type Polymorphic Systems
    P Deka, S Das, P Sarma, KJ Kalita, RK Vijayaraghavan, CM Reddy, ...
    Crystal Growth & Design 24 (6), 2322-2330 , 2024
    2024
    Citations: 10
  • Tris chelated meridional isomers of Co (III) complexes: Synthesis, crystal structure, protein binding, cytotoxicity studies and DFT/TDDFT calculation
    D Saren, S Das, A Paul, SS Tat, MK Santra, TK Si, H Puschmann, ...
    Inorganica Chimica Acta 550, 121423 , 2023
    2023
    Citations: 9
  • Heparin‐Induced Dual Mode Luminescence Modulation of Organic Nanoparticles and Efficient Energy Transfer
    R Biswas, S Das, H Puschmann, S Banerjee
    Chemistry–An Asian Journal 18 (9), e202300100 , 2023
    2023
    Citations: 5
  • Non-stoichiometric carbamazepine cocrystal hydrates of 3, 4-/3, 5-dihydroxybenzoic acids: coformer–water exchange
    T Rajbongshi, KK Sarmah, S Das, P Deka, A Saha, BK Saha, ...
    Chemical Communications 59 (26), 3902-3905 , 2023
    2023
    Citations: 10
  • Elastic organic semiconducting single crystals for durable all-flexible field-effect transistors: insights into the bending mechanism
    R Samanta, S Das, S Mondal, T Alkhidir, S Mohamed, SP Senanayak, ...
    Chemical Science 14 (6), 1363-1371 , 2023
    2023
    Citations: 70
  • Viscoelastic covalent organic nanotube fabric via macroscopic entanglement
    K Koner, S Das, S Mohata, NT Duong, Y Nishiyama, S Kandambeth, ...
    Journal of the American Chemical Society 144 (35), 16052-16059 , 2022
    2022
    Citations: 21
  • Temperature‐reliant dynamic properties and elasto‐plastic to plastic crystal (rotator) phase transition in a metal oxyacid salt
    S Das, S Saha, M Sahu, A Mondal, CM Reddy
    Angewandte Chemie 134 (8), e202115359 , 2022
    2022
    Citations: 38
  • On the elasticity of Copper (II) acetylacetonate crystals
    S Das, G Vreeman, U Ramamurty, CC Sun, CM Reddy
    ChemRxiv 2021 (0804) , 2021
    2021
  • Harnessing molecular rotations in plastic crystals: a holistic view for crystal engineering of adaptive soft materials.
    S Das, A Mondal, CM Reddy
    Acta Cryst 77, C1017 , 2021
    2021
  • Metal-like ductility and malleability in organic plastic crystals
    A Mondal, B Bhattacharya, S Das, S Bhunia, R Chowdhury, S Dey, ...
    Acta Cryst 77, C1224 , 2021
    2021
  • Autonomous self-repair in piezoelectric molecular crystals
    S Bhunia, S Chandel, SK Karan, S Dey, A Tiwari, S Das, N Kumar, ...
    Science 373 (6552), 321-327 , 2021
    2021
    Citations: 183
  • Elastic orange emissive single crystals of 1, 3-diamino-2, 4, 5, 6-tetrabromobenzene as flexible optical waveguides
    V Gude, PS Choubey, S Das, SB BN, CM Reddy, K Biradha
    Journal of Materials Chemistry C 9 (30), 9465-9472 , 2021
    2021
    Citations: 31
  • Metal‐like Ductility in Organic Plastic Crystals: Role of Molecular Shape and Dihydrogen Bonding Interactions in Aminoboranes
    A Mondal, B Bhattacharya, S Das, S Bhunia, R Chowdhury, S Dey, ...
    Angewandte Chemie International Edition 59 (27), 10971-10980 , 2020
    2020
    Citations: 100
  • Screening, crystal structures and solubility studies of a series of multidrug salt hydrates and cocrystals of fenamic acids with trimethoprim and sulfamethazine
    B Bhattacharya, S Das, G Lal, SR Soni, A Ghosh, CM Reddy, S Ghosh
    Journal of Molecular Structure 1199, 127028 , 2020
    2020
    Citations: 71

MOST CITED SCHOLAR PUBLICATIONS

  • Harnessing molecular rotations in plastic crystals: a holistic view for crystal engineering of adaptive soft materials
    S Das, A Mondal, CM Reddy
    Chemical Society Reviews 49 (24), 8878-8896 , 2020
    2020
    Citations: 241
  • Autonomous self-repair in piezoelectric molecular crystals
    S Bhunia, S Chandel, SK Karan, S Dey, A Tiwari, S Das, N Kumar, ...
    Science 373 (6552), 321-327 , 2021
    2021
    Citations: 183
  • Metal‐like Ductility in Organic Plastic Crystals: Role of Molecular Shape and Dihydrogen Bonding Interactions in Aminoboranes
    A Mondal, B Bhattacharya, S Das, S Bhunia, R Chowdhury, S Dey, ...
    Angewandte Chemie International Edition 59 (27), 10971-10980 , 2020
    2020
    Citations: 100
  • Screening, crystal structures and solubility studies of a series of multidrug salt hydrates and cocrystals of fenamic acids with trimethoprim and sulfamethazine
    B Bhattacharya, S Das, G Lal, SR Soni, A Ghosh, CM Reddy, S Ghosh
    Journal of Molecular Structure 1199, 127028 , 2020
    2020
    Citations: 71
  • Elastic organic semiconducting single crystals for durable all-flexible field-effect transistors: insights into the bending mechanism
    R Samanta, S Das, S Mondal, T Alkhidir, S Mohamed, SP Senanayak, ...
    Chemical Science 14 (6), 1363-1371 , 2023
    2023
    Citations: 70
  • Temperature‐reliant dynamic properties and elasto‐plastic to plastic crystal (rotator) phase transition in a metal oxyacid salt
    S Das, S Saha, M Sahu, A Mondal, CM Reddy
    Angewandte Chemie 134 (8), e202115359 , 2022
    2022
    Citations: 38
  • Multidrug salt forms of norfloxacin with non-steroidal anti-inflammatory drugs: solubility and membrane permeability studies
    B Bhattacharya, A Mondal, SR Soni, S Das, S Bhunia, KB Raju, A Ghosh, ...
    CrystEngComm 20 (41), 6420-6429 , 2018
    2018
    Citations: 36
  • Elastic orange emissive single crystals of 1, 3-diamino-2, 4, 5, 6-tetrabromobenzene as flexible optical waveguides
    V Gude, PS Choubey, S Das, SB BN, CM Reddy, K Biradha
    Journal of Materials Chemistry C 9 (30), 9465-9472 , 2021
    2021
    Citations: 31
  • Viscoelastic covalent organic nanotube fabric via macroscopic entanglement
    K Koner, S Das, S Mohata, NT Duong, Y Nishiyama, S Kandambeth, ...
    Journal of the American Chemical Society 144 (35), 16052-16059 , 2022
    2022
    Citations: 21
  • Gas release as an efficient strategy to tune mechanical properties and thermoresponsiveness of dynamic molecular crystals
    S Das, L Catalano, Y Geerts
    Small 20 (34), 2401317 , 2024
    2024
    Citations: 12
  • Exceptional Thermo-Mechano-Fluorochromism and Nanomechanical Analysis of Mechanically Responsive J and H Type Polymorphic Systems
    P Deka, S Das, P Sarma, KJ Kalita, RK Vijayaraghavan, CM Reddy, ...
    Crystal Growth & Design 24 (6), 2322-2330 , 2024
    2024
    Citations: 10
  • Non-stoichiometric carbamazepine cocrystal hydrates of 3, 4-/3, 5-dihydroxybenzoic acids: coformer–water exchange
    T Rajbongshi, KK Sarmah, S Das, P Deka, A Saha, BK Saha, ...
    Chemical Communications 59 (26), 3902-3905 , 2023
    2023
    Citations: 10
  • Tris chelated meridional isomers of Co (III) complexes: Synthesis, crystal structure, protein binding, cytotoxicity studies and DFT/TDDFT calculation
    D Saren, S Das, A Paul, SS Tat, MK Santra, TK Si, H Puschmann, ...
    Inorganica Chimica Acta 550, 121423 , 2023
    2023
    Citations: 9
  • On the importance of crystal structures for organic thin film transistors
    G Schweicher, S Das, R Resel, Y Geerts
    Crystal Structure Communications 80 (10) , 2024
    2024
    Citations: 7
  • Heparin‐Induced Dual Mode Luminescence Modulation of Organic Nanoparticles and Efficient Energy Transfer
    R Biswas, S Das, H Puschmann, S Banerjee
    Chemistry–An Asian Journal 18 (9), e202300100 , 2023
    2023
    Citations: 5
  • rsc. li/chem-soc-rev
    S Das, A Mondal, CM Reddy, YB Chen, PC Qian, LW Ye
    Chem. Soc. Rev 49, 8873-8877 , 2020
    2020
    Citations: 4
  • Boric acid as supramolecular graphite
    S Das, K Yadava, CM Reddy, S Saha
    Chemical Communications 61 (90), 17649-17652 , 2025
    2025
    Citations: 2
  • Plasticization of a stiff pharmaceutical solid for better tabletability via cocrystallization: Shape synthons as supramolecular protecting groups
    A Mondal, B Bhattacharya, H Chen, S Khazaei, S Das, S Bhunia, S Dey, ...
    Chemical Engineering Research and Design 210, 506-512 , 2024
    2024
    Citations: 2
  • Isomorphism in a Series of Five Homologous Compounds
    A Andotra, S Das, CE Killalea, F Malagreca, C Zuffa, P Pandey, S Khan, ...
    Crystal Growth & Design , 2026
    2026
  • Control of Polymorphism and Alignment in Photochromic Salicylideneaniline Crystals Grown by Directional Crystallization
    Y Hagiwara, G Schweicher, S Das, S Hasebe, T Asahi, H Koshima, ...
    Crystal Growth & Design 25 (7), 2090-2098 , 2025
    2025