Structure directing roles of weak noncovalent interactions and charge-assisted hydrogen bonds in the self-assembly of solvated podands: an example of an anion-assisted dimeric water capsule
作者:Sandeep Kumar Dey、Sarvesh S. Harmalkar、Rahul K. H. O. Yadav、Prem Lama
DOI:10.1039/d2ce00180b
日期:——
also with bromide counter-anions which are located outside the tripodal cavity. Unlike [2·H2O], no lattice water is encapsulated within the molecular cavity of protonated podand 3 in its dibromide salt [(3H2)2+·(Br−)2·(4H2O)] and tetrabromide salt [(3H4)4+·(Br−)4·(H2O·CH3OH)] due to intramolecular hydrogen bonding and π–π interactions between the pendent arms. The crystal structures of both dibromide
阐明了由 1,3,5-三(溴甲基)均三甲苯和三(4-氨基-N-乙基苯甲酰胺)胺的两种溴化物盐 ( 3 ) 合成的两个新的 podand 分子(1和2 )的晶体结构,以见证结构弱非共价相互作用(C-H 和 π-π 相互作用)和/或电荷辅助氢键在溶剂化荚果的有组织自组装中的指导作用。Podand 1从丙酮中结晶为 [ 1 ·(CH 3 ) 2 CO],并通过C-H⋯O 氢键和 π-π 相互作用显示出自组装,生成组织良好的三维框架。豆荚2从甲醇-水中结晶为 [ 2 ·H 2 O],并显示形成氢键二聚体胶囊组装体,其中封装的水分子与三足支架的芳香族 C-H 质子和胺 N-H 质子相互作用,并且还溴化物反阴离子位于三足腔外。与[ 2 ·H 2 O]不同的是,没有晶格水被包裹在质子化荚果的分子腔内,3在其二溴化物盐[( 3 H 2 ) 2+ ·(Br - ) 2 ·(4H 2 O)]和四溴化物盐中[(