Article
Chemistry, Multidisciplinary
Ali Azmy, Shunran Li, Giasemi K. Angeli, Claire Welton, Parth Raval, Min Li, Nourdine Zibouche, Lukasz Wojtas, G. N. Manjunatha Reddy, Peijun Guo, Pantelis N. Trikalitis, Ioannis Spanopoulos
Summary: We have developed a strategy for generating porosity in hybrid metal halide materials using molecular cages as structure-directing agents and counter-cations. The resulting material, (DHS)(2)Pb5Br14, is the first porous and water-stable 2D metal halide semiconductor. It exhibits selective and reversible adsorption of H2O and D2O at room temperature, along with broad light emission. The water stability and porosity of this material present new possibilities for applications in solid-state batteries and other areas.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Multidisciplinary
Xiaoyu He, Yao Deng, Decai Ouyang, Na Zhang, Jing Wang, Akshay A. Murthy, Ioannis Spanopoulos, Saiful M. Islam, Qing Tu, Guichuan Xing, Yuan Li, Vinayak P. Dravid, Tianyou Zhai
Summary: This article reviews the current progress of materials and device architectures in the field of radiation detection, with a focus on the research achievements of halide perovskite materials. It provides an extensive overview of various compound properties, including organic-inorganic hybrid, all-inorganic, all-organic perovskite, and antiperovskite structures, as well as breakthroughs in device structures, performance, and environmental stability. The article highlights the critical advancements in the field in recent years, and provides valuable insights for the development of next-generation materials and devices for radiation detection and imaging applications.
Article
Chemistry, Multidisciplinary
Michail P. Minadakis, Ruben Canton-Vitoria, Christina Stangel, Emmanuel Klontzas, Raul Arenal, Javier Hernandez-Ferrer, Ana M. Benito, Wolfgang K. Maser, Nikos Tagmatarchis
Summary: This study reports on the covalent functionalization of tungsten disulfide (WS2) with photo- and electro-active nickel-porphyrin (NiP). The hybrid material WS2-NiP is characterized using spectroscopic, microscopic, and thermal techniques, and evaluated for its electrocatalytic behavior using advanced electrochemical techniques. The observed photo-enhanced electrocatalytic activity is attributed to the presence of Ni centers coordinated by tethered porphyrin derivative chains, which serve as photoreceptors. This pioneering work opens up new possibilities for water oxidation and the development of non-noble metal electrocatalysts.
Article
Materials Science, Multidisciplinary
Maria-Eirini Grigora, Zoi Terzopoulou, Diana Baciu, Theodore Steriotis, Georgia Charalambopoulou, Eleni Gounari, Dimitrios N. Bikiaris, Dimitrios Tzetzis
Summary: This study investigated the effect of two different types of bioactive coatings on the properties of 3D printed poly(lactic acid)/montmorillonite nanocomposite scaffolds. The scaffolds were coated with ordered mesoporous strontium bioglass (SrBG) and SrBG combined with nanohydroxyapatite (nHA) using a simple dip coating procedure. The coatings improved the hydrophilicity, elastic modulus, and hardness of the scaffolds. Moreover, the coating process enhanced biomineralization and promoted the differentiation of stem cells towards osteoblasts, making it a fast, economical, and effective method for bone tissue engineering applications.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Sofia Stefa, Maria Griniezaki, Marinos Dimitropoulos, George Paterakis, Costas Galiotis, George Kiriakidis, Emmanuel Klontzas, Michalis Konsolakis, Vassilios Binas
Summary: In this study, the physicochemical properties and enhanced adsorption capacity of highly porous thin-layer graphitic carbon nitride (g-C3N4) nanosheets (CNNs) for dye separation were investigated. Highly porous g-C3N4 nanosheets were synthesized and compared with the bulk material. The results showed that the nanosheets had a well-oriented structure, adequate chemical stability, and a higher surface area. Adsorption experiments demonstrated that the nanosheets had excellent selective adsorption capacity for cationic dyes, with short equilibrium times. The experimental findings were further supported by theoretical calculations.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Doyun Kim, Eugenia S. Vasileiadou, Ioannis Spanopoulos, Mercouri G. Kanatzidis, Qing Tu
Summary: The thermomechanical behavior of 2D hybrid organic-inorganic perovskites (HOIPs) needs to be thoroughly understood in order to address the strain and temperature stressors in semiconductor device applications. In this study, atomic force microscopy (AFM) stretching of suspended membranes is used to measure the temperature dependence of the in-plane Young's modulus of model Ruddlesden-Popper 2D HOIPs. The results reveal a non-monotonic dependence on temperature, including abnormal thermal stiffening behavior and subsequent thermal softening, which is significantly different from their 3D counterparts. These findings provide insight into the structural origin of the thermomechanical behavior and guidance for designing 2D HOIPs with desired properties.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Inorganic & Nuclear
Constantinos Tsangarakis, Ali Azmy, Christos Tampaxis, Nourdine Zibouche, Emmanuel Klontzas, Emmanuel Tylianakis, George E. Froudakis, Theodore Steriotis, Ioannis Spanopoulos, Pantelis N. Trikalitis
Summary: We synthesized two new water-stable compounds based on amide functionalized trigonal tritopic organic linkers H3BTBTB (L1) utilizing the etb platform of MOFs. The mesoporous Al(L1) material showed significant methane and CO2 adsorption capacities, with the CH4 uptake values among the highest reported for mesoporous MOFs and CO2 adsorption values among the best recorded for CO2 storage using porous materials. The presence of strong CH4 adsorption sites near the amide groups was revealed through theoretical calculations, providing insights into the enhanced CH4 storage capacity.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Emilia Papasouli, Jacques Desmarais, Hassan Denawi, Demetrios Xenides, Emmanuel Klontzas, Emmanuel N. Koukaras, Nicolas Otero, Panaghiotis Karamanis
Summary: Pillared graphenes, consisting of stacked graphene layers separated by spacers or pillars, have attracted significant attention in material science due to their potential applications in optoelectronics, flexible electronics, energy storage, catalysis, and sensing. In this study, we focused on a special class of these materials where graphene sheets are covalently connected by diamino organic molecules. By analyzing the optical behavior of these materials using density functional theory, we found that the graphene layers dominate both the linear and nonlinear optical profiles, while the diamino pillars indirectly affect the optical behavior through local structural modifications. The study also revealed that certain local structural patterns can significantly influence the optical absorption profiles, excited states, and nonlinear optical behavior.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Nikita Kolobov, Abdelali Zaki, Katarzyna Swirk, Partha Maity, Luis Garzon-Tovar, Giasemi K. Angeli, Alla Dikhtiarenko, G. Delahay, Pantelis N. Trikalitis, Abdul-Hamid Emwas, Amandine Cadiau, Omar F. Mohammed, Christopher H. Hendon, Karim Adil, Jorge Gascon
Summary: Despite efforts to develop efficient Ti-based metal-organic framework (MOF) photocatalysts, MIL-125-NH2 remains the benchmark, and few design principles have been offered to improve photocatalytic performance. Linker functionalization in Ti MOFs has been shown to enhance photocatalysis under visible light by closing the electronic band gap and improving charge carrier lifetimes. The role of node nuclearity and topology on photocatalytic activity in known Ti-based MOFs is still unclear. Here, we report a new MOF, ICGM-1, with a 3D-connected framework featuring 1D Ti-O rods. Photocatalytic hydrogen evolution experiments reveal a significant difference in activity, solely attributed to node geometry. Time-resolved spectroscopy and DFT calculations explain these differences in terms of electronic and geometric properties, paving the way for the development of Ti-MOF photocatalysts.
ACS MATERIALS LETTERS
(2023)
Article
Chemistry, Inorganic & Nuclear
Filippo Peru, Seyedhosein Payandeh, Torben R. Jensen, Georgia Charalambopoulou, Theodore Steriotis
Summary: A composite material of 0.71 LiBH4-0.29 NaBH4 and CMK-3 carbon with nanopores was successfully synthesized, showing improved hydrogen absorption-desorption kinetics. After five cycles, the composite maintained a consistent uptake of about 3.5 wt.% H-2. The enhanced kinetics were attributed to carbon-hydride surface interactions and the heat transfer capability of the carbon support. The nanopore confinement may also contribute to the improved reversibility.
Article
Nanoscience & Nanotechnology
Ali Azmy, Xue Zhao, Giasemi K. Angeli, Claire Welton, Parth Raval, Lukasz Wojtas, Nourdine Zibouche, G. N. Manjunatha Reddy, Pantelis N. Trikalitis, Jianfeng Cai, Ioannis Spanopoulos
Summary: A porous, visible light semiconductor (DHS)Bi2I8 is reported, which is composed of nontoxic, earth-abundant elements and exhibits water stability for over a year. It selectively and reversibly adsorbs water while remaining impervious to nitrogen and carbon dioxide. In addition to its porosity, it also emits broad bandedge light and exhibits bacteriocidal action.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Edward Loukopoulos, Giasemi K. Angeli, Constantinos Tsangarakis, Eleni Traka, Konstantinos G. Froudas, Pantelis N. Trikalitis
Summary: An exciting direction in metal-organic frameworks is the design and synthesis of flexible structures that can adapt their structure when triggered by external stimuli. This study successfully developed two novel families of flexible MOFs based on rare-earth metals, shedding light on their unique responsive behavior and gas sorption properties. It demonstrates the possibility of controlling the dynamic behavior of these materials and their associated properties.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Physical
Panagiota Bika, Ilias Papailias, Tatiana Giannakopoulou, Christos Tampaxis, Theodore A. Steriotis, Christos Trapalis, Panagiotis Dallas
Summary: New heterojunction materials were synthesized by molecularly bonding the monomers of a covalent organic framework on the template of carbon nitride. These materials showed enhanced CO production rates compared to traditional materials in the photocatalytic reduction of carbon dioxide.
Article
Nanoscience & Nanotechnology
Ali Azmy, Xue Zhao, Giasemi K. Angeli, Claire Welton, Parth Raval, Lukasz Wojtas, Nourdine Zibouche, G. N. Manjunatha Reddy, Pantelis N. Trikalitis, Jianfeng Cai, Ioannis Spanopoulos
Summary: (DHS)Bi2I8 is a porous visible light semiconductor material that is composed of non-toxic abundant elements and can remain stable in water for more than a year. It has the ability to selectively adsorb H2O and D2O and exhibits bacteriocidal action.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Chemistry, Multidisciplinary
Dan He, Yawen Li, Fuwen Zhao, Yuze Lin
Summary: High trap density in organic solar cells leads to localized charge carriers and reduced carrier lifetime, limiting device efficiency. This feature article summarizes the recent advances of trap suppression by material design and device engineering.
CHEMICAL COMMUNICATIONS
(2024)
Review
Chemistry, Multidisciplinary
Olivier Monfort, Arshitha Madhusudhan, Martin Motola
Summary: This article presents the advantages of coupling photocatalysis and Fenton-based processes for environmental remediation and discusses their synergy. It critically examines the simultaneous triggering of these two processes and provides insights into research approaches. The study aims to enhance understanding of this complex process and highlight the potential integration of new catalysts in current wastewater treatment technology.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Manideepa Dhar, Chittaranjan Mishra, Avijit Das, Uttam Manna
Summary: An approach of 'polymerization of monomers in its aggregated form' has been introduced to tailor the water wettability of fibrous and porous substrates, achieving hydrophobicity to superhydrophobicity transition, as well as patterned wettability. This facile chemical method provides a durable coating with adjustable and patterned wettability for various potential applications.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Saswat Ranjan Bhoi, Chhanda Debnath, Shikha Gandhi
Summary: In this article, a novel catalytic reaction using Pd(0) and Bronsted acid is reported for the synthesis of biologically important imidazolidinone-fused N-heterocycles through redox-neutral intramolecular N-allylation of indoles and pyrroles with alkynes. This atom-economical method is applicable to a wide range of substrates and eliminates the need for leaving groups or oxidizing agents commonly used in traditional allylation reactions.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Longkun Chen, Mingshuai Zhang, Meichen Liu, Zhuoyuan Liu, Yuetong Qiu, Zhilai Zhang, Fuchao Yu, Jiuzhong Huang
Summary: In this study, an efficient Rh(III)-catalyzed selective mono- and dual-C-H bond functionalization/cyclization with iodonium ylide as the sole coupling partner was demonstrated. Fused benzodiazepine skeletons were obtained in excellent yields, providing an improved approach to dual C-H unsymmetrical functionalization.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Alice Kennett, Sven Epple, Gabriella van der Valk, Irene Georgiou, Evelyne Gout, Romain R. Vives, Angela J. Russell
Summary: This study presents the design and synthesis of sulfated disaccharide inhibitors based on IdoA(2S)-GlcNS(6S), which showed potent inhibition of Sulf-2. The results suggest that IdoA(2S)-GlcNS(6S) is the shortest fragment size required for effective inhibition of Sulfs, and a trisulfated disaccharide is identified as the minimal fragment size of heparan sulfate for effective endosulfatase inhibition.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Mauro Garbini, Andrea Brunetti, Riccardo Pedrazzani, Magda Monari, Massimo Marcaccio, Giulio Bertuzzi, Marco Bandini
Summary: The self-adaptability of galvanostatic electrolysis was found to be helpful in a multistage chemo- and diastereoselective electrochemically promoted cyclodimerization of chalcones. Through a series of reductive events, densely functionalized cyclopentanes with five contiguous stereocenters were obtained (25 examples, yields up to 95%, dr values up to >20:1). Further experimental and electrochemical investigations indicated the crucial role of dynamic kinetic resolution of the aldol intermediate in the reaction mechanism.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Dhananjay S. Nipate, Neha Meena, Prakash N. Swami, Krishnan Rangan, Anil Kumar
Summary: In this study, the synthesis of functionalized benzo[a]phenazines and indazolo[2,3-a]quinolines was achieved through Rh(III)-catalyzed oxidative annulation of 2-arylquinoxalines and 2-aryl-2H-indazoles with allyl alcohols. The method showed a wide substrate scope, excellent functional group tolerance, good to high yields of annulated products, and the capability for scaled-up synthesis. A tentative mechanism of the annulation reaction was proposed based on a preliminary mechanistic investigation.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Ruonan Zhang, Abudukadi Tudi, Xia Yang, Xuping Wang, Zhihua Yang, Shujuan Han, Shilie Pan
Summary: A new lead tellurium borate material with a unique fundamental building block [B4O10] was synthesized and found to exhibit high birefringence. The structure-property relationship was discussed using first-principles calculations.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Amresh Kumar Singh, Baishali Thakurta, Anupam Giri, Monalisa Pal
Summary: This study introduces three key concepts for the quick synthesis of large-scale high-quality 2D materials films and their utilization in device fabrication.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Reina Hagiwara, Shun Nishimura, Kosuke Okeyoshi
Summary: A copolymer-conjugated nanocatalytic system has been developed to improve electron transfer and enhance photoinduced H2 generation.
CHEMICAL COMMUNICATIONS
(2024)
