Mixed-Valence CuI/CuIII Metal–Organic Frameworks with Non-innocent Ligand for Multielectron Transfer Shang‐Yuan Fu, Cheng‐Han Chang, Alexander S. Ivanov, Ilja Popovs, Jeng‐Lung Chen, Yen‐Fa Liao, Hsin‐Kuan Liu, Suman Chirra, Yun‐Wei Chiang, Jui‐Chin Lee, Wei‐Ling Liu, Watchareeya Kaveevivitchai, Teng‐Hao Chen Angewandte Chemie International Edition, 2023 We report two novel three‐dimensional copper‐benzoquinoid metal–organic frameworks (MOFs), [Cu4L3]n and [Cu4L3 ⋅ Cu(iq)3]n (LH4=1,4‐dicyano‐2,3,5,6‐tetrahydroxybenzene, iq=isoquinoline). Spectroscopic techniques and computational studies reveal the unprecedented mixed valency in MOFs, formal Cu(I)/Cu(III). This is the first time that formally Cu(III) species are witnessed in metal–organic extended solids. The coordination between the mixed‐valence metal and redox‐non‐innocent ligand L, which promotes through‐bond charge transfer between Cu metal sites, allows better metal‐ligand orbital overlap of the d‐π conjugation, leading to strong long‐range delocalization and semiconducting behavior. Our findings highlight the significance of the unique mixed valency between formal Cu(I) and highly‐covalent Cu(III), non‐innocent ligand, and pore environments of these bench stable Cu(III)‐containing frameworks on multielectron transfer and electrochemical properties.
Versatile Bifunctional Ag@g-C3N4/r-GO Catalyst for Efficient Photo- and Electrocatalytic H2 Production Sripal Reddy Gujjula, Ujjwal Pal, Nageshwarrao Chanda, Sampath Karingula, Suman Chirra, Suresh Siliveri, Srinath Goskula, Venkatathri Narayanan Energy and Fuels, 2023 Here, we develop a series of hybrid Ag@g-C3N4/r-GO nanocomposite materials that are highly active, durable, and adaptable for electro- and photocatalytic H2 generation under visible light by employing a rapid and simple sonochemical technique. Multiple catalytic behaviors can be achieved through the strategic introduction of Ag metal into a hierarchical structure consisting of photo- and electroactive two-dimensional (2D) sheets with various band configurations. The outcomes of this work show the development of heterojunctions and show how electro- and photocatalysis were both synergistically improved. The fabricated materials were examined for photocatalytic hydrogen evolution, photoelectrocatalytic (PEC) hydrogen evolution, and electrocatalytic hydrogen evolution reaction (HER). In both photocatalytic conditions at 1.5 AM simulated light irradiation and electrocatalytic conditions, silver-doped composites showed better activity. Among all of the fabricated catalysts, the Ag20%@g-C3N4/r-GO (A20CNG) catalyst displayed the highest apparent quantum yield (AQY) of 1.69 and the highest hydrogen generation rate (954 μmol g–1 h–1). However, in the case of electrocatalysis, Ag15%@g-C3N4/r-GO (A15CNG) showed impressive HER activity with a low overpotential (η) of 0.484 V at 10 mA cm–2 current density with 130.6 mV dec–1 Tafel slope value and also exhibited approximately 16 times more current density than that of g-C3N4/GO (CNGO) at a fixed overpotential in the HER process; this was also supported by the electrochemical active surface area (ECSA). On the basis of the impressive results shown above, the Ag@g-C3N4/r-GO (ACNG) catalyst might be a promising and flexible nanocomposite for photo-, photoelectro-, and electrocatalytic hydrogen evolutions. This is the first study to our knowledge that provides the results of a comprehensive examination into the photo- and electrocatalytic application of an interesting and versatile bifunctional catalyst.
Hybrid Conducting Polymers as Sensors and Biosensors S SK, M Sathish, S Chirra, BVB Rao, N Singh Tuning of Conducting Polymers: Applications from Environmental to Biomedical … , 2026 2026
Tailored Conducting Polymers for Photocatalytic Treatment of Water S Chirra, R Aepuru, M Sathish Tuning of Conducting Polymers, 81–114 , 2026 2026 Citations: 1
Fabrication of porous La2O3/r-GO nano composites for enhanced post combustion CO2 capture G Srinath, G Sripal Reddy, S Suresh, C Suman, N Venkatathri Journal of Porous Materials 33, 339-347 , 2025 2025
Unveiling the environmental threat of acetaminophen: ecotoxicology, microbial remediation, and molecular modelling insights MS Waghmode, DK Sahoo, NN Patil, PS Abhyankar, S Chirra, T Sohajda Environmental Monitoring and Assessment 197 (12), 1326 , 2025 2025 Citations: 5
MOF-derived synergistic Co 9 S 8 @C/Ag 3 VO 4 nanohybrids for enhanced photo- and electrocatalytic hydrogen production SR Gujjula, N Chanda, S Karingula, S Goskula, S Chirra, U Pal, ... Journal of Materials Science 60 (36), 16240-16260 , 2025 2025 Citations: 2
Hydrogen storage on a star-like CBe₅Li₅+ superalkali cluster featuring planar pentacoordinate carbon GN Reddy, A Aash, S Chirra, S Karmakar, G Roymahapatra Computational and Theoretical Chemistry, 115447 , 2025 2025
An Investigation of the Characterization and Drug Delivery Potential of Ibuprofen Using Modified High Surface Area Porous Materials S Chirra, SR Gujjula, S Siliveri, S Goskula, CM Andugula, VK Ponnala, ... Silicon, 1-11 , 2025 2025 Citations: 4
Fabrication of porous nano silica materials by template-assisted strategy for controlled drug delivery studies S Chirra, SR Gujjula, S Manda, S Goskula, V Narayanan Journal of Porous Materials, 1-12 , 2024 2024 Citations: 3
Development of activated sustainable porous carbon adsorbents from Karanja shell biomass and their CO 2 adsorption S Goskula, S Siliveri, SR Gujjula, AK Adepu, S Chirra, V Narayanan Biomass Conversion and Biorefinery 14 (24), 32413-32425 , 2024 2024 Citations: 17
Back Cover: Mixed‐Valence Cu I /Cu III Metal–Organic Frameworks with Non‐innocent Ligand for Multielectron Transfer (Angew. Chem. Int. Ed. 50/2023) SY Fu, CH Chang, AS Ivanov, I Popovs, JL Chen, YF Liao, HK Liu, ... Angewandte Chemie International Edition 62 (50), e202315461 , 2023 2023
Mixed‐Valence Cu I /Cu III Metal–Organic Frameworks with Non‐innocent Ligand for Multielectron Transfer SY Fu, CH Chang, AS Ivanov, I Popovs, JL Chen, YF Liao, HK Liu, ... Angewandte Chemie International Edition 62 (50), e202312494 , 2023 2023 Citations: 13
Sustainable Development of Activated Porous Carbon Materials from Gum Arabic Tree Seed Shell for CO 2 Capture S Goskula, S Siliveri, SR Gujjula, S Chirra, AK Adepu, V Narayanan Water, Air, & Soil Pollution 234 (8), 513 , 2023 2023 Citations: 7
A versatile bifunctional Ag@g-C3N4/r-GO catalyst for efficient photo and electrocatalytic H2 production SR Gujjula, U Pal, N Chanda, S KARINGULA, S Chirra, S Siliveri, ... Energy & Fuels , 2023 2023 Citations: 26
Rational design of metal organic framework derived porous Au@Co3O4/C nanocomposite materials for the electrochemical overall water splitting VN Sripal Reddy Gujjula, Sampath Karingula, Shanavas Shajahan, Suresh ... Journal of Materials Science 58 (https://doi.org/10.1007/s10853-023-08619 … , 2023 2023 Citations: 18
Synthesis of Sustainable Acid Biochar Catalysts Derived from Waste Biomass for Esterification of Glycerol VN Srinath Goskula, Suresh Siliveri, Sripal Reddy Gujjula, Suman Chirra ChemistrySelect 8 (11) , 2023 2023 Citations: 7
Sustainable Micro Porous Activated Carbons Synthesis from Gum Arabic Tree Seed Shell Using KOH as an Activation Agent and Their CO2 Capture S Goskula, S Siliveri, SR Gujjula, S Chirra, AK Adepu, V Narayanan Available at SSRN 4231053 , 2023 2023 Citations: 3
Rapid synthesis of a novel nano-crystalline mesoporous faujasite type metal-organic framework, ZIF-8 catalyst, its detailed characterization, and NaBH4 assisted, enhanced … S Chirra, LF Wang, H Aggarwal, MF Tsai, SS Soorian, S Suresh, ... Materials Today Communications 26, 101993 , 2021 2021 Citations: 47
Investigation on the promoter-induced rapid non-aqueous media synthesis of SAPO-35 and methanol-to-olefin reaction S Siliveri, SSK Pinnepalli, D Joshi, S Chirra, S Goskula, SR Gujjula, ... ACS omega 6 (8), 5661-5669 , 2021 2021 Citations: 8
Pd/SAPO-35: Synthesis, Characterization and its Catalytic application studies on Suzuki-Miyaura Cross Coupling Reaction. S Suresh, C Suman, G Srinath, G Sripal Reddy, N Venkatathri Materials Today: Proceedings 45 (3), 3778-3783 , 2021 2021 Citations: 4
Synthesis of a novel bifunctional mesoporous Ti-SBA-15-SO3H catalyst and studies on their enhanced performance and kinetic modeling of lactic acid esterification reaction with … S Chirra, R Kalakuntala, S Siliveri, S Goskula, SR Gujjula, DN Yadav, ... Materials Today: Proceedings , 2021 2021 Citations: 10
MOST CITED SCHOLAR PUBLICATIONS
Rapid synthesis of a novel nano-crystalline mesoporous faujasite type metal-organic framework, ZIF-8 catalyst, its detailed characterization, and NaBH4 assisted, enhanced … S Chirra, LF Wang, H Aggarwal, MF Tsai, SS Soorian, S Suresh, ... Materials Today Communications 26, 101993 , 2021 2021 Citations: 47
Pd-KIT-6: synthesis of a novel three-dimensional mesoporous catalyst and studies on its enhanced catalytic applications S Chirra, S Siliveri, AK Adepu, S Goskula, SR Gujjula, V Narayanan Journal of Porous Materials 26 (6), 1667–1677 , 2019 2019 Citations: 34
Synthesis of a high-surface area V 2 O 5/TiO 2–SiO 2 catalyst and its application in the visible light photocatalytic degradation of methylene blue AK Adepu, S Goskula, S Chirra, S Siliveri, SR Gujjula, V Narayanan RSC advances 9 (42), 24368-24376 , 2019 2019 Citations: 28
A versatile bifunctional Ag@g-C3N4/r-GO catalyst for efficient photo and electrocatalytic H2 production SR Gujjula, U Pal, N Chanda, S KARINGULA, S Chirra, S Siliveri, ... Energy & Fuels , 2023 2023 Citations: 26
A novel porous Fe3O4/Titanosilicate/g-C3N4 ternary nanocomposites: Synthesis, characterization and their enhanced photocatalytic activity on Rhodamine B degradation under … A Ajay Kumar, S Suresh, C Suman, G Srinath, G Sripal Reddy, A Rajini, ... Journal of Water Process Engineering 34, 101141 , 2020 2020 Citations: 25
Rational design of metal organic framework derived porous Au@Co3O4/C nanocomposite materials for the electrochemical overall water splitting VN Sripal Reddy Gujjula, Sampath Karingula, Shanavas Shajahan, Suresh ... Journal of Materials Science 58 (https://doi.org/10.1007/s10853-023-08619 … , 2023 2023 Citations: 18
Development of activated sustainable porous carbon adsorbents from Karanja shell biomass and their CO 2 adsorption S Goskula, S Siliveri, SR Gujjula, AK Adepu, S Chirra, V Narayanan Biomass Conversion and Biorefinery 14 (24), 32413-32425 , 2024 2024 Citations: 17
Mixed‐Valence Cu I /Cu III Metal–Organic Frameworks with Non‐innocent Ligand for Multielectron Transfer SY Fu, CH Chang, AS Ivanov, I Popovs, JL Chen, YF Liao, HK Liu, ... Angewandte Chemie International Edition 62 (50), e202312494 , 2023 2023 Citations: 13
Synthesis of new multivalent metal ions functionalized mesoporous silica and studies on their enhanced antimicrobial and cytotoxicity activities C Suman, S Suresh, G Ravi, G Srinath, G Sripal Reddy, A Ajay Kumar, ... Journal of Materials Chemistry B 7 (45), 7235-7245 , 2019 2019 Citations: 13
New Porous High Surface Area, TiO2 Anatase/SAPO‐35 Mild Brønsted Acidic Nanocomposite: Synthesis, Characterization and Studies on it's Enhanced Photocatalytic Activity S Suresh, C Suman, T Chinkit, G Ambedkar, A Ajay Kumar, G Srinath, ... ChemistrySelect 4 (31), 9135-9142 , 2019 2019 Citations: 11
Synthesis of a novel bifunctional mesoporous Ti-SBA-15-SO3H catalyst and studies on their enhanced performance and kinetic modeling of lactic acid esterification reaction with … S Chirra, R Kalakuntala, S Siliveri, S Goskula, SR Gujjula, DN Yadav, ... Materials Today: Proceedings , 2021 2021 Citations: 10
Magnetically separable porous titanosilicate/Fe 3 O 4 hybrid nanocomposites with enhanced photocatalytic performance under UV light irradiation AK Adepu, S Goskula, S Chirra, S Siliveri, SR Gujjula, N Venkatathri Journal of Porous Materials 26 (5), 1259-1267 , 2019 2019 Citations: 9
Titanium aminophosphates: synthesis, characterization, antimicrobial and cytotoxicity studies A Rajini, AK Adepu, S Chirra, N Venkatathri RSC Advances 5 (106), 87713-87722 , 2015 2015 Citations: 9
Investigation on the promoter-induced rapid non-aqueous media synthesis of SAPO-35 and methanol-to-olefin reaction S Siliveri, SSK Pinnepalli, D Joshi, S Chirra, S Goskula, SR Gujjula, ... ACS omega 6 (8), 5661-5669 , 2021 2021 Citations: 8
Sustainable Development of Activated Porous Carbon Materials from Gum Arabic Tree Seed Shell for CO 2 Capture S Goskula, S Siliveri, SR Gujjula, S Chirra, AK Adepu, V Narayanan Water, Air, & Soil Pollution 234 (8), 513 , 2023 2023 Citations: 7
Synthesis of Sustainable Acid Biochar Catalysts Derived from Waste Biomass for Esterification of Glycerol VN Srinath Goskula, Suresh Siliveri, Sripal Reddy Gujjula, Suman Chirra ChemistrySelect 8 (11) , 2023 2023 Citations: 7
A novel method of synthesis and a new insight into the vanadium incorporation in three dimensional mesoporous KIT-6 S Chirra, N Venkatathri Materials Research Express 6 (1), 015021 , 2018 2018 Citations: 7
Titanium aminophosphates as efficient, economical, and recyclable catalysts for the synthesis of xanthenediones A Rajini, C Suman, A Ajay Kumar, S Suresh, N Venkatathri Synthetic Communications 46 (20), 1671-1677 , 2016 2016 Citations: 7
Unveiling the environmental threat of acetaminophen: ecotoxicology, microbial remediation, and molecular modelling insights MS Waghmode, DK Sahoo, NN Patil, PS Abhyankar, S Chirra, T Sohajda Environmental Monitoring and Assessment 197 (12), 1326 , 2025 2025 Citations: 5
Titanium aminophosphates: synthesis, characterization and crystal violet dye degradation studies R Anumula, AK Adepu, S Chirra, S Siliveri, V Narayanan RSC Advances 6 (1), 507-514 , 2015 2015 Citations: 5
