Supramolecular Dimers of Copper(II) Complexes Resulting from Designed Host-Guest Interactions
Supramolecular Dimers of Copper(II) Complexes Resulting from Designed Host-Guest Interactions
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由设计的主客体相互作用产生的铜（II）配合物的超分子二聚体
DOI：
10.1002/ejic.200900857
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发表时间：
2010
影响因子：
2.3
通讯作者：
Nayak M
中科院分区：
文献类型：
--
作者：
Nayak M
本研究描述了四种设计的主- guest化合物cuiil12∧(H3N（乙烯）NH3)(NO3) 2(1)、cuiil12∧(H3N（丙烯）NH3)(NO3) 2(2)、cuiil12∧(H3N（丁烯）NH3)(NO3) 2(3)和cuiil22∧(H3N（乙烯）NH3)(NO3) 2(4)的合成、表征和晶体结构。H2L1= N， N′‐乙烯双（3‐甲氧基水杨酸二胺）；H2L2= N， N′‐乙烯双（3‐乙氧基水杨酸醛二胺）；乙烯= (CH2) 2;丙烯= (CH2) 3;丁烯= (CH2) 4。化合物2和3分别在正交Pcab和单斜C2/c体系中结晶，而化合物1和4的空间群为三斜P / 1。在所有这四个化合物1-4中，H3N (CH2) nnh32 +指示（n= 2 - 4）的两个+ NH3位点通过分叉的n - h··O（苯氧基）和n - h··O（甲氧基/乙氧基）氢键相互作用在两个CuIIL1/L2基团的O4隔室中充当客人。显然，两个单核铜（II）基团通过桥接的超分子合成子相互连接，从而在标题化合物中形成超分子二聚体。从H3N (CH2) nnh32 +的N原子从最小二乘O（苯氧基）2O（甲氧基/乙氧基）2平面位移的程度来看，显然CuIIL1比CuIIL2更适合作为双质子化二胺的宿主。比较了水和双质子化二胺在CuIIL1/L2中的包合情况。有趣的是，在水和双质子化二胺这两种客体物质中，CuIIL2倾向于前者，而CuIIL1倾向于后者。
Syntheses, characterization and crystal structures of fourdesigned host–guest compounds of the compositions CuIIL1 2⊂(H3N (ethylene) NH3)(NO3) 2 (1), CuIIL1 2⊂(H3N (propylene) NH3)(NO3) 2 (2), CuIIL1 2⊂(H3N (butylene) NH3)(NO3) 2 (3) and CuIIL2 2⊂(H3N (ethylene) NH3)(NO3) 2 (4) are described in this investigation H2L1= N, N′‐ethylenebis (3‐methoxysalicylaldimine); H2L2= N, N′‐ethylenebis (3‐ethoxysalicylaldimine); ethylene=(CH2) 2; propylene=(CH2) 3; butylene=(CH2) 4. Compounds 2 and 3 crystallize in the orthorhombic Pcab and monoclinic C2/c systems, respectively, while the space group of compounds 1 and 4 is triclinic P ̄1. In all of these four compounds 1–4, the two+ NH3 sites of the H3N (CH2) nNH3 2+ dication (n= 2–4) behave as guests in the O4 compartment of two CuIIL1/L2 moieties through bifurcated N–H··· O (phenoxo) and N–H··· O (methoxy/ethoxy) hydrogen‐bonding interactions. Evidently, two mononuclear copper (II) moieties are interlinked by bridging supramolecular synthons, resulting in the formation of a supramolecular dimer in the title compounds. From the extent of displacement of the N atoms of H3N (CH2) nNH3 2+ from the least‐squares O (phenoxo) 2O (methoxy/ethoxy) 2 plane, it is clear that CuIIL1 is a better host than CuIIL2 for the diprotonated diamine guests. Comparison of the inclusion of water and diprotonated diamines in CuIIL1/L2 is also described in the present investigation. Interestingly, of the two guest species, water and diprotonated diamines, CuIIL2 prefers the former and CuIIL1 prefers the latter.