Article
Chemistry, Multidisciplinary
Philip Klement, Natalie Dehnhardt, Chuan-Ding Dong, Florian Dobener, Samuel Bayliff, Julius Winkler, Detlev M. Hofmann, Peter J. Klar, Stefan Schumacher, Sangam Chatterjee, Johanna Heine
Summary: The research demonstrates the unique optical properties of single layers of 1D organic-inorganic perovskites, including self-trapped excitons and white-light emission. The thickness dependence of the structure leads to a significant shift in emission energy, challenging conventional understanding.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Ruijing Fu, Wenya Zhao, Lingrui Wang, Zhiwei Ma, Guanjun Xiao, Bo Zou
Summary: By high-pressure processing, emission enhancement and non-doping control of color temperature can be achieved in two-dimensional perovskite nanocrystals.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Xiaoyu Liu, Yuanyuan Li, Tianyuan Liang, Jiyang Fan
Summary: The study compared three novel 0D hybrid tin halides and found that their optical properties are influenced by the type of polyhedron, such as different polyhedral structures affecting luminescence decay modes and photon energies.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Review
Chemistry, Multidisciplinary
Feng Jiang, Zhennan Wu, Min Lu, Yanbo Gao, Xin Li, Xue Bai, Yuan Ji, Yu Zhang
Summary: The appearance of metal halide perovskites allows for efficient and broadband emission in single-component materials. The characteristics of self-trapped excitons and ns(2) ions play important roles in achieving broadband emission.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Xiaoyu Liu, Yuanyuan Li, Tianyuan Liang, Wenjie Liu, Jiyang Fan
Summary: This study investigates the photodynamics of six novel types of low-dimensional hybrid copper halides, revealing two origins of photon emission with distinct temperature dependence. Experimental and first-principles calculations identify two types of self-trapped excitons (STEs) as the sources of photon emission. The softness of the organic cations in the copper halide plays a crucial role in determining the self-trapping type of the STEs.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Miao-Ling Lin, Balaji Dhanabalan, Giulia Biffi, Yu-Chen Leng, Seda Kutkan, Milena P. Arciniegas, Ping-Heng Tan, Roman Krahne
Summary: The soft hybrid organic-inorganic structure of two-dimensional layered perovskites enables broadband emission at room temperature. The photophysics of these materials, including exciton self-trapping and phonon coupling, is studied. The directional symmetries of phonon modes are investigated using angle-resolved polarized Raman spectroscopy and correlated to the temperature-dependence of the emission, providing insights into the lattice deformations and recombination dynamics.
Article
Chemistry, Physical
Tingfang Tian, Xuhui Xiong, Yaxuan Zhao, Hao Li, Wei Wang, Li Wang
Summary: CsAgCl2 is a material with self-trapped exciton emission that can emit warm white light, making it ideal for high color rendering lighting.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Jumana Hasin Marayathungal, Neeraja Puthuparambil, Deep Das, Mini Kalyani, Rangarajan Bakthavatsalam, Janardan Kundu
Summary: This article reports a novel class of emerging solid-state materials called multicomponent heterometallic zero-dimensional halide hybrids, which have multiple functionalities due to the unique electronic properties of the constituent metal halide units. The synthesis of such materials is challenging due to the preferential crystallization of one-component structures. In this study, a single-crystalline bulk assembly of a 0D heterometallic halide hybrid was successfully achieved, demonstrating multimodal emission and strong white light emission without utilizing a secondary down-converting blue light source. The thermochromism observed in the material was also exploited for optical thermometry, indicating its potential applications in lighting and temperature sensing.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Huanxin Yang, Xiangxiang Chen, Haolin Lu, Yue Li, Wenda Sun, Yuhai Zhang, Xiaowang Liu, Guankui Long, Libing Zhang, Xiyan Li
Summary: This study demonstrates a long-lived warm-white emission derived from Cs2NaInCl6:Ag,Bi materials, allowing for easy customization of afterglow color using filters. The introduction of 3% Ag alloying and 3% Bi doping improves the quantum yield and enhances afterglow persistence by approximately 100-fold, resulting in an impressive afterglow persistence of over 20,000 s.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Guicheng Yu, Fang Lin, Kang Zhou, Shaofan Fang, Yumeng Shi, Wei Liu, Hanlin Hu, Biwu Ma, Haoran Lin
Summary: In this study, an organic-metal halide hybrid with a one-dimensional structure at the molecular level has been reported, showing a record-setting photoluminescence quantum efficiency and high color rendering index as a promising single-component white-light emitter. The experimental observation of photoluminescence quenching and transformation suggests a degradation process involving water-molecule replacement and moisture-induced cleavage of 1D lead halide chains.
CHEMISTRY OF MATERIALS
(2021)
Article
Multidisciplinary Sciences
Jieyuan Cui, Yang Liu, Yunzhou Deng, Chen Lin, Zhishan Fang, Chensheng Xiang, Peng Bai, Kai Du, Xiaobing Zuo, Kaichuan Wen, Shaolong Gong, Haiping He, Zhizhen Ye, Yunan Gao, He Tian, Baodan Zhao, Jianpu Wang, Yizheng Jin
Summary: Solution-processed planar perovskite light-emitting diodes (LEDs) offer high performance and cost-effective electroluminescent devices suitable for large-area display and lighting applications. LEDs utilizing perovskite nanoplatelets with a high ratio of horizontal transition dipole moments (TDMs) have demonstrated an enhanced light-outcoupling efficiency and achieved a peak EQE of 23.6%, making them highly efficient planar perovskite LEDs.
Article
Chemistry, Inorganic & Nuclear
Mohamed Saber Lassoued, Qian-Cheng Luo, Yan-Zhen Zheng
Summary: A new 3D lead chloride hybrid, (H2MPP)2Pb5Cl14, has been isolated, which exhibits broadband emission with a large Stokes shift and a high color rendering index (CRI), mainly attributed to the self-trapped exciton mechanism (STE). It also shows higher stability under moisture, UV light and heat.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Inorganic & Nuclear
Mohamed Saber Lassoued, Qian-Cheng Luo, Yan-Zhen Zheng
Summary: A new 3D lead chloride hybrid, (H2MPP)2Pb5Cl14, has been isolated, which exhibits broadband emission with a large Stokes shift and a high color rendering index (CRI), mainly attributed to the self-trapped exciton mechanism (STE).
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Multidisciplinary
Zhikai Qi, Yali Chen, Yao Guo, Xuelian Yang, Huizhi Gao, Guojun Zhou, Shi-Li Li, Xian-Ming Zhang
Summary: A new one-dimensional face-shared hybrid lead bromide with intrinsic broadband yellow-light emission has been obtained, surpassing previously reported similar materials. The investigation of the emission mechanism in this material opens up possibilities for discovering more exceptional light-emitting materials.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Yu Zhang, Yaogang Zhang, Yuyan Zhao, Hao Jia, Zhengwei Yang, Baipeng Yin, Yuchen Wu, Yuanping Yi, Chuang Zhang, Jiannian Yao
Summary: Hybrid metal halides (HMHs) are materials that combine exceptional photophysical properties and excellent processability through solid-liquid transition. This study reports the design and synthesis of zero-dimensional HMHs [M-(DMSO)(6)]-[SbCl6], with an alternating arrangement of isolated octahedra of [M-(DMSO)(6)](3+) and [SbCl6](3-) in the crystal structure. The luminescent center of [SbCl6](3-) enables the generation of self-trapped excitons, resulting in broadband photoluminescence with a large Stokesshift and high quantum yield. The controlled release of DMSO ligands leads to a low melting point of approximately 90 degrees C for HMHs.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Sangeetha Kumaravel, Dhirendra Kumar, Selvasundarasekar Sam Sankar, Arun Karmakar, Ragunath Madhu, Krishnendu Bera, Hariharan N. Dhandapani, Sreenivasan Nagappan, Sudip Chakraborty, Subrata Kundu
Summary: An advanced vacancy-rich bi-chalcogenide, Cu2S-Se@Cu, was developed as a highly efficient catalyst for HER in acid. The catalyst exhibited a small overpotential and a low Tafel slope. Density functional theory studies revealed that Cu2S-Se over the Cu surface reduced the band gap and enhanced the catalytic activity.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Hemalatha Kanniyappan, Joseph Jose, Sudip Chakraborty, Megala Ramasamy, Vignesh Muthuvijayan
Summary: Mesoporous silica nanoparticles (MSNs) with their specific structure, high surface area, pore volume, and biocompatibility, have a significant potential for drug delivery. This study focuses on pH-responsive MSNs for controlled drug delivery, and develops positively charged MSNs under acidic conditions. The loaded drugs, including anticancer drug doxorubicin, topical anesthetic lidocaine, and anti-inflammatory drug indomethacin, were successfully adsorbed onto the MSNs. The pH-responsive behavior of the drug-loaded MSNs was characterized, and the sustained release of doxorubicin in different pH environments was investigated using mathematical modeling.
JOURNAL OF THE AUSTRALIAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Ashish Kumar Kar, Ranjini Sarkar, Arjun K. Manal, Ravi Kumar, Sudip Chakraborty, Rajeev Ahuja, Rajendra Srivastava
Summary: In this study, the catalytic transfer hydrodeoxygenation (CTHDO) of vanillin over a defect-induced UIO-66 MOF was investigated. The unique structural features of the defect-induced UIO-66 MOF significantly enhanced the CTHDO of vanillin. The creation of defects, confirmed by various characterization techniques, resulted in the generation of Lewis acid and dynamic Bronsted acid.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Tariq Sheikh, Gokul M. Anilkumar, Tisita Das, Atikur Rahman, Sudip Chakraborty, Angshuman Nag
Summary: Hybrid lead halide perovskites and their derivatives are important optoelectronic materials, but their water instability is a major challenge in material design. In this study, a hybrid lead halide perovskite derivative system, (4,4'-VDP)Pb2Br6, was designed using the concepts of pi-conjugation and cation-pi interaction. The system exhibited improved photoconductivity and water stability due to the electronic communication between the Pb-Br units and the intermolecular cation-pi interaction throughout the organic sublattice.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Vivek Polshettiwar, Rajesh Belgamwar, Rishi Verma, Tisita Das, Sudip Chakraborty, Pradip Sarawade
Summary: A highly active and stable Cu-based catalyst was developed for the conversion of CO2 to CO by creating a strong metal-support interaction (SMSI) between Cu active sites and TiO2-coated dendritic fibrous nano-silica (DFNS/TiO2). The catalyst exhibited excellent catalytic performance and remained active even after 200 hours of reaction. The presence of SMSI between Cu and TiO2 was confirmed by various spectroscopic techniques. The continuous generation and regeneration of defects during the reaction led to long-term high catalytic activity and stability.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Riya Wadhwa, Ashok Kumar, Ranjini Sarkar, Prajna Parimita Mohanty, Deepu Kumar, Sonia Deswal, Pradeep Kumar, Rajeev Ahuja, Sudip Chakraborty, Mahesh Kumar, Mukesh Kumar
Summary: A highly sensitive and selective H2 sensor based on Pt nanoparticle-functionalized MoS2 flakes is reported. The sensor exhibits high sensitivity, fast response, and complete recovery at room temperature. The superior response is attributed to spillover effect and adsorption sites on the Pt surface and MoS2-Pt interface. Pt nanoparticle-sensitized MoS2 is suggested as a potential candidate for low-power and room-temperature H2 sensors for hydrogen vehicles and related technologies in the near future.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Deepa Singh, Shashwat Singh, Ponnappa Kechanda Prasanna, Rajeev Kumar Rai, Prae Chirawatkul, Sudip Chakraborty, Maximilian Fichtner, Prabeer Barpanda
Summary: ZnCo2(PO4)(2), a zinc-substituted cobalt phosphate synthesized using a low-cost solution combustion route, exhibited efficient oxygen evolution and reduction activities. The crystal structure of ZnCo2(PO4)(2) consists of distorted cobalt and zinc trigonal bipyramids, which allow it to function as a robust bifunctional catalyst comparable to precious metal catalysts. This research provides valuable insights for the development of highly efficient and stable electrocatalysts for metal-air batteries.
INORGANIC CHEMISTRY
(2023)
Article
Polymer Science
Ponrasu Thangavel, Hemalatha Kanniyappan, Sudip Chakraborty, Shipra Chaudhary, Aadinath Wallepure, Vignesh Muthuvijayan
Summary: Biomimetic scaffolds were prepared using konjac glucomannan (KGM) and silk fibroin (SF), which were cross-linked with citric acid and lyophilized to obtain fibrous structures. The KGM/SF scaffolds exhibited improved thermal stability, porous morphology, and biodegradable nature. They also showed enhanced compression strength and demonstrated biocompatibility, cell viability, and vascularization efficacy in tissue engineering and biomedical applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Physical
Yulia Lekina, David G. G. Bradley, Yonghao Xiao, Adisak Thanetchaiyakup, Xin Zhao, Jagjit Kaur, Sudip Chakraborty, Han Sen Soo, John V. V. Hanna, Ze Xiang Shen
Summary: In this study, the effect of hydrostatic pressure on the optical properties of hexadecylammonium lead iodide was investigated. It was found that the organic spacer can influence the mechanical and optoelectronic properties, leading to the formation of micrometer-scale bandgap junctions that can be used in novel optoelectronic devices.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Showkat H. Mir, Sudip Chakraborty
Summary: This study investigates the effects of hydrostatic pressure on the structural, electronic, and optical properties of a perovskite compound. The application of pressure leads to band gap narrowing and a reduction in effective carrier masses, which could be beneficial for optoelectronic applications.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Showkat H. Mir, Sudip Chakraborty
Summary: Hybrid perovskites have gained attention for their high power conversion efficiency, but are often toxic or unstable. Halide double perovskites are being explored as alternative materials for optoelectronic applications. A new double perovskite, Cs2AgPdCl5, with a unique arrangement of B-site cation, was studied using density functional theory. Under hydrostatic pressure, the material demonstrated piezochromism and approached the Shockley-Queisser limit for bandgap.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Nikolaos Livakas, Stefano Toso, Yurii P. Ivanov, Tisita Das, Sudip Chakraborty, Giorgio Divitini, Liberato Manna
Summary: Halide exchange is a popular method to modify the properties of CsPbX3 nanocrystals. While exchanging Cl with Br and Br with I can form stable mixed-halide nanocrystals, exchanging Cl with I is more challenging due to a miscibility gap. This study reveals that the reaction proceeds through the formation of iodide-doped CsPbCl3 nanocrystals covered by a CsI shell, which then transition to short-lived CsPb(ClxI1-x)(3) nanocrystals and eventually transform into chloride-doped CsPbI3 nanocrystals.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Muhammad Naufal Lintangpradipto, Hongwei Zhu, Bingyao Shao, Wasim J. Mir, Luis Gutierrez-Arzaluz, Bekir Turedi, Mutalifu Abulikemu, Omar F. Mohammed, Osman M. Bakr
Summary: Grain-free single-crystal perovskites can improve the stability of perovskite solar cells. MA-free SC-PSCs have achieved new stability and efficiency benchmarks, making them promising candidates for commercialization.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Physical
Shalini Tomar, Sudip Chakraborty
Summary: The demand for an electrochemical water-splitting mechanism is increasing due to the growth in green and renewable energy conversion needs. However, developing efficient electrocatalysts remains a major challenge. In this study, DFT was used to investigate the catalytic activities of ZrS2, ZrSe2, and ZrTe2 layered structures for the HER, OER, and ORR reactions. The effects of non-metal functionalization were also examined. The findings provide valuable insights for designing cost-effective and efficient 2D electrocatalysts.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Chemistry, Multidisciplinary
Vijay Kumar, Praval Pratap Singh, Ashish Ranjan Dwivedi, Naveen Kumar, Rakesh Kumar, Subash Chandra Sahoo, Sudip Chakraborty, Vinod Kumar
Summary: A facile methodology without catalysts was developed to selectively functionalize 4,6-diphenylpyrimidin-2(1H)-ones under mild conditions. Cs2CO3 in DMF was used to achieve selectivity towards the O-regioisomer without coupling reagents. A total of 14 regioselective O-alkylated 4,6-diphenylpyrimidines were synthesized in yields of 81-91%. DFT studies showed that the transition state for forming the O-regioisomer is more favorable with Cs2CO3 compared to K2CO3. Furthermore, this method was extended to increase the O/N ratio for alkylation of 2-phenylquinazolin-4(3H)-one derivatives.