Crystalline polyoxo-titanium clusters(PTCs),as a molecular model of TiO_(2)nanomaterials,have attracted unprecedented attention due to their designable structure,tunable band gap,catalysis,and photochromic properties....Crystalline polyoxo-titanium clusters(PTCs),as a molecular model of TiO_(2)nanomaterials,have attracted unprecedented attention due to their designable structure,tunable band gap,catalysis,and photochromic properties.A new trinuclear Ti3-oxo cluster,[Ti3(μ2-O)(μ3-O)(abz)_(6)(OiPr)_(2)]·CH_(3)CN·H_(2)O(Ti3),was synthesized by solvothermal method with a yield of 60%by using 4-aminobenzoic acid as ligand.Single-crystal X-ray diffraction shows that it has a[Ti3(μ2-O)(μ3-O)(abz)_(6)(OiPr)_(2)]trinuclear cluster structure.Ti3 crystallizes in monoclinic space group P21/c with a=11.091(1),b=22.837(2),c=22.754(1)Å,β=90.580(6)°,V=5763.0(6)Å3,Z=4,Dc=1.345 g·cm-3,F(000)=2412,μ=2.743 mm^(−1),R=0.0796,and wR=0.2260(I>2σ(I)).Ti3 shows typical semiconductive behavior determined by temperature-dependent conductivity test.The chemiresistive humidity sensor fabricated by Ti3 showed good performance,including high response(four orders of magnitude current change from 0 to 100%RH)and fast response time(160 s)and recovery time(26 s).展开更多
基金Supported by the National Natural Science Foundation of China (21975254, 21905280, 21950410532, 2019M662254)Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Open Research Fund (ES202080085)the Youth Innovation Promotion Association CAS (2018342)
文摘Crystalline polyoxo-titanium clusters(PTCs),as a molecular model of TiO_(2)nanomaterials,have attracted unprecedented attention due to their designable structure,tunable band gap,catalysis,and photochromic properties.A new trinuclear Ti3-oxo cluster,[Ti3(μ2-O)(μ3-O)(abz)_(6)(OiPr)_(2)]·CH_(3)CN·H_(2)O(Ti3),was synthesized by solvothermal method with a yield of 60%by using 4-aminobenzoic acid as ligand.Single-crystal X-ray diffraction shows that it has a[Ti3(μ2-O)(μ3-O)(abz)_(6)(OiPr)_(2)]trinuclear cluster structure.Ti3 crystallizes in monoclinic space group P21/c with a=11.091(1),b=22.837(2),c=22.754(1)Å,β=90.580(6)°,V=5763.0(6)Å3,Z=4,Dc=1.345 g·cm-3,F(000)=2412,μ=2.743 mm^(−1),R=0.0796,and wR=0.2260(I>2σ(I)).Ti3 shows typical semiconductive behavior determined by temperature-dependent conductivity test.The chemiresistive humidity sensor fabricated by Ti3 showed good performance,including high response(four orders of magnitude current change from 0 to 100%RH)and fast response time(160 s)and recovery time(26 s).
