影像科学与光化学2017，Vol.35Issue(5)：686-697,12.DOI:10.7517/j.issn.1674-0475.2017.04.029
新型Cd-苯并噻二唑类的金属有机骨架中的光诱导脱羧反应
Photoinduced Decarboxylation Reaction in New Cd-benzothiadiazole Metal-organic Framework
摘要
Abstract
Based on the same benzothiadiazole (BTD) ligand (H2L =2,1,3-benzothiadiazole-4,7-dicarboxylic acid),two new 3D BTD-derived Cd (Ⅱ) metal-organic frameworks 1 [Cd4 (BTDC)4 · 5H2O] and 2 [Cd2 (BTDC)2 (DMF) · 1.5H2O] were obtained by the different solvothermal reactions.Interestingly,in 1,partial BTD units arranged in an anti-parallel mode,and the distance between these BTD units was 3.987 (A),which was less than that valued by theoretical calculation (4 (A)).Furthermore,evidencedby UV-Vis solid state absorption spectra of 1,the energy of absorption band at 470 nm was lower than those from typical monomerBTD unit.Hence,the structural analysis and photophysical study distinctly demonstrated the evidence of BTD anti-dimmerin 1.More importantly,the UV and fluorescence spectra after illumination showed that there were interesting photochromic phenomena in both complexes 1 and 2 triggered by photoinduced electron transfer,where anionic radical was also directly observed by the electron paramagnetic resonance (EPR) spectra before and after the illumination.Herein,FT-IR spectra show that the subsequent decarboxylation of ligand unit results to release CO2 gas (2331 cm-1,2361 cm-1) in complexes 1 and 2.关键词
苯并噻二唑-MOF/光诱导脱羧/阴离子自由基Key words
Benzothiadiazole-MOFs/photo-induced decarboxylation/anionic radical引用本文复制引用
程清,余飞虎,韩晓,马科,丁洁,侯红卫..新型Cd-苯并噻二唑类的金属有机骨架中的光诱导脱羧反应[J].影像科学与光化学,2017,35(5):686-697,12.基金项目
感谢国家自然科学基金会(21371155,21301157,21671174)和郑州大学优秀青年基金(1521316017)对本研究的支持. （21371155,21301157,21671174）
