Structural perception into the supramolecular self-assembly directed by C-H center dot center dot center dot pi and pi center dot center dot center dot pi interactions of 5,15-di(4 '-carboxyphenyl)-10,20-di(pyrenyl) zinc porphyrin linker

摘要

Solid state self-assembly of trans-A(2)B(2) metalloporphyrin 5,15-Di(4'-carboxyphenyl)-10,20-Di(pyrenyl) zinc porphyrin linker Zn(H2O)-H-2 DcpDpyrP directed by C-H center dot center dot center dot pi and pi center dot center dot center dot pi interactions has been investigated. Crystallization of Zn-H-2 DcpDpyrP in solvent mixture (DMF and methanol) at high temperature followed by slow cooling resulted in the crystals of Zn(H2O)-H-2 DcpDpyrP (1). Scrutiny of the crystal structure reveals that porphyrin molecules are joined to form a one dimensional polymeric array through self-complimentary O-H center dot center dot center dot O interactions between water molecules coordinated to the Zn(II) and 4-carboxyphenyl groups of adjacent molecules. Besides, and pi center dot center dot center dot pi stacking interactions played a dominant role to generate extended two dimensional supramolecular sheets and provide stability to the structure. Hirshfeld surface analyses gave an insight into directional as well as strength of the intermolecular interactions. SEM data disclosed a plate shaped morphology which strongly supported the supramolecular self-assembly driven by O-H center dot center dot center dot O, and pi center dot center dot center dot pi interactions. (C) 2020 Elsevier B.V. All rights reserved.