Related Experiment Video
Updated: Sep 18, 2025
Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance
Published on: September 5, 2018
Enhanced Photocatalytic Efficiency and Structural Stability of Uranyl-Organic Coordination Polymers via the Semirigid
Zi-Xin Wang1, Song-Bai Tang1, Ke-Xin Xu1
1College of Chemistry, Sichuan University, Chengdu 610064, P. R. China.
Abstract:
Uranyl-organic coordination polymers (UOCPs) have been demonstrated to exhibit photocatalytic activity, but highly stable UOCPs with excellent photocatalytic efficiency are rare. Herein, we present a series of UOCPs built by a semirigid benzimidazole-derived carboxyl ligand. By rationally designing the rigid and flexible sections of the ligand, we have obtained UO2(HBDA)(OH)·H2O (UOCP-SU-1), UO2(HBDA)(H2BDA)(NO3)·H2O (UOCP-SU-2), and UO2(HBDA)2 (UOCP-SU-3) with multiple spatial configurations under different conditions ([H3BDA]Cl = 1,3-bis(4-carboxybenzyl)-1,3-dihydro-2H-benzo[d]imidazol-2-iminium chloride). The structural and photoelectrochemical properties of these UOCPs were systematically investigated, and the relationship between coordination structure and the photocatalytic performance for photooxidation of benzylamine to N-benzylenzoimide has been well established. The UOCP-SU-1 with bridged oxygen ligands in the coordination structure exhibits the best visible-light response and chemical conformational stability activity. Importantly, the UOCP-SU-1 can maintain its original crystal structures after 10 cycles of catalysis. This work provides a novel strategy for developing efficient uranyl-based photocatalysts for organic reactions.
More Related Videos
04:51Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange
Published on: June 23, 2023
13:51Synthesis of Core-shell Lanthanide-doped Upconversion Nanocrystals for Cellular Applications
Published on: November 10, 2017
Related Concept Videos
00:43Complexometric Titration: Ligands
02:34Structural Isomerism
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
01:19Complexation Equilibria: The Chelate Effect
02:58Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
02:51Metal-Ligand Bonds
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
02:42Valence Bond Theory