Govindarajan R, Nagarajaprakash R, Manimaran Bala
Department of Chemistry, Pondicherry University , Puducherry 605014, India.
Inorg Chem. 2015 Nov 16;54(22):10686-94. doi: 10.1021/acs.inorgchem.5b01543. Epub 2015 Nov 3.
Aminoquinonato bridged Re(I)-based metallarectangles have been constructed via an orthogonal bonding approach. Self-assembly of Re2(CO)10 and aminoquinone ligands in the presence of ditopic linear pyridyl ligands has resulted in the formation of metallarectangles of the general formula [{(CO)3Re(μ-η(4)-L)Re(CO)3}2(μ-N-L'-N)2] (1-4), wherein 1, L = 2,5-bis(n-butylamino)-1,4-benzoquinonato (bbbq) and N-L'-N = 4,4'-bipyridine (bpy); 2, L = 2,5-bis(phenethylamino)-1,4-benzoquinonato (bpbq) and N-L'-N = 4,4'-bipyridine; 3, L = 2,5-bis(n-butylamino)-1,4-benzoquinonato (bbbq) and N-L'-N = trans-1,2-bis(4-pyridyl)ethylene (bpe) and 4, L = 2,5-bis(phenethylamino)-1,4-benzoquinonato (bpbq) and N-L'-N = trans-1,2-bis(4-pyridyl)ethylene (bpe). Metallarectangles 1-4 have been characterized by elemental analysis, IR, NMR, and UV-vis absorption spectroscopic techniques. The molecular structures of 1 and 4 were determined by single-crystal X-ray diffraction methods. The molecular recognition capability of 1 and 3 with pyrene and triphenylene has been investigated using UV-vis absorption and emission spectroscopic techniques. The formation of host-guest complex has been further corroborated by the single-crystal X-ray structural evidence of carceplex system (3⊃pyrene)·(DMF).
通过正交键合方法构建了氨基醌桥联的基于铼（I）的金属矩形。在双齿线性吡啶配体存在下，Re2(CO)10与氨基醌配体自组装，形成了通式为[{(CO)3Re(μ-η(4)-L)Re(CO)3}2(μ-N-L'-N)2]（1-4）的金属矩形，其中1，L = 2,5-双（正丁基氨基）-1,4-苯醌（bbbq）且N-L'-N = 4,4'-联吡啶（bpy）；2，L = 2,5-双（苯乙氨基）-1,4-苯醌（bpbq）且N-L'-N = 4,4'-联吡啶；3，L = 2,5-双（正丁基氨基）-1,4-苯醌（bbbq）且N-L'-N =反式-1,2-双（4-吡啶基）乙烯（bpe），4，L = 2,5-双（苯乙氨基）-1,4-苯醌（bpbq）且N-L'-N =反式-1,2-双（4-吡啶基）乙烯（bpe）。金属矩形1-4已通过元素分析、红外光谱、核磁共振光谱和紫外可见吸收光谱技术进行了表征。1和4的分子结构通过单晶X射线衍射方法确定。使用紫外可见吸收和发射光谱技术研究了1和3对芘和三亚苯的分子识别能力。主客体配合物的形成已通过包结配合物体系（3⊃芘）·（二甲基甲酰胺）的单晶X射线结构证据得到进一步证实。
