Site-selective homo- and hetero-metallic doping of a 1D Zn-based coordination polymer to enhance the dimensionality and photocurrent responses
作者:Bing Wu、Wen-Hua Zhang、Jian-Ping Lang
DOI:10.1039/c6ce00187d
日期:——
By utilizing the coordination unsaturation of 1,2,3-benzenetricarboxylate (1,2,3-BTA) and protonated N,N′-di(3-pyridyl)succinamide (L) in the as-synthesized 1D coordination polymer (CP) of [(H2L)0.5][Zn(1,2,3-BTA)(H2O)]·2H2O (1), we successfully doped an additional half equivalent of Zn2+ and Co2+ ions to yield [Zn3L(1,2,3-BTA)2(H2O)6]·4H2O (2) and [Zn2CoL(1,2,3-BTA)2(H2O)6]·4H2O (2c). Compounds 2 and 2c are also possible through direct one-pot metal–ligand assembly. With the one-pot method, [Zn2.76Co0.24L(1,2,3-BTA)2(H2O)6]·4H2O (2a) and [Zn2.40Co0.60L(1,2,3-BTA)2(H2O)6]·4H2O (2b) are accordingly prepared to demonstrate the universality of hetero-metallic doping and for probing the doping effect on photocurrent responses. Compounds 2, 2a–2c are 2D CPs formed by linking 1,2,3-BTA-based 1D chains through L ligands. Their photocurrent responses were found to be positively related to the Co2+ percentage of the doped materials.
通过利用1,2,3-苯三羧酸盐(1,2,3-BTA)的配位不饱和性和质子化的N,N′-二(3-吡啶基)琥珀酰胺(L)在合成的1D配位聚合物[(H2L)0.5][Zn(1,2,3-BTA)(H2O)]·2H2O(1)中,我们成功掺入了额外的半个当量的Zn2+和Co2+离子,分别得到[Zn3L(1,2,3-BTA)2(H2O)6]·4H2O(2)和[Zn2CoL(1,2,3-BTA)2(H2O)6]·4H2O(2c)。化合物2和2c也可以通过直接的一锅法金属-配体组装获得。采用一锅法,分别制备了[Zn2.76Co0.24L(1,2,3-BTA)2(H2O)6]·4H2O(2a)和[Zn2.40Co0.60L(1,2,3-BTA)2(H2O)6]·4H2O(2b),以展示异金属掺杂的普遍性,并探讨掺杂对光电流响应的影响。化合物2、2a-2c是通过L配体连接基于1,2,3-BTA的1D链形成的2D配位聚合物。它们的光电流响应与掺杂材料中Co2+的比例呈正相关。