abstract
A dinuclear cadmium(II) complex, [Cd2(Hhqc)2(H2O)4] (H3hqc=4,8-dihydroxyquinoline-2-carboxylic acid) was synthesized and characterized by single crystal X-ray diffraction studies, elemental analyses and thermo-gravimetric studies. The metal centers are found to be six coordinated with distorted pentagonal pyramidal geometry around them. The complex shows few significant intermolecular hydrogen bonding interactions to produce a three dimensional supramolecular network comprising of T8(2) water tapes. Besides these non-covalent interactions few other supramolecular interactions are also involved within the molecular dimer like pi & sdot;& sdot;& sdot;pi stacking, Cd & sdot;& sdot;& sdot;pi etc. They have been analyzed using DFT calculations, MEP surface analyses and NCI plot index analyses. The detailed study highlights the complex interplay of pi-stacking, H-bonding, and spodium interactions in stabilizing the dimers of complex, which providing precious insights into their energetic and structural characteristics. Further more, the catalytic efficiency of the synthesized complex has been investigated as an effective heterogeneous catalyst in the Knoevenagel condensation reactionunder solvent-free conditions.
keywords
METAL-ORGANIC FRAMEWORKS; COORDINATION POLYMERS; CRYSTAL-STRUCTURES; CADMIUM(II) COMPLEXES; COPPER(II) COMPOUNDS; DEPENDENT SYNTHESIS; LIGAND; DESIGN; ACID; LUMINESCENCE
subject category
Chemistry
authors
Sadhukhan, A; Patra, BN; Maity, T; Das, AK; Ghosh, CK; Brandao, P; Gil, DM; Bera, D; Choudhury, CR; Bhaumik, PK; Mal, D; Frontera, A
our authors
Paula Cristina Ferreira da Silva Brandão
Assistant ResearcherProjects
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
acknowledgements
Financial support from Department of Science & Technology and Biotechnology, Government of West Bengal,by a grant (Grant No. 28(sanc)-ST/P/S&T/15G-4/2018 to D. M.) is gratefully acknowledged.AKD gratefully acknowledges the Department of Science & Technology and Biotechnology, Govt. of West Bengal for financial grant (Grant No. 2147(Sanc.)/STBT-11012(25)/1/2024-ST SEC).Paula Brand & atilde;o gratefully acknowledges the financial support of this work by the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by national funds through the FCT/MCTES (PIDDAC).