Influence of 2-Amino-4-methylpyridine and 2-Aminopyrimidine Ligands on the Malonic Acid-Cu(II) System: Insights through Supramolecular Interactions and Photoresponse Properties

Tripti Mandal; Arka Dey; Saikat Kumar Seth; Joaquín Ortega-Castro; Arnold L Rheingold; Partha Pratim Ray; Antonio Frontera; Subrata Mukhopadhyay

doi:10.1021/acsomega.9b02971

Influence of 2-Amino-4-methylpyridine and 2-Aminopyrimidine Ligands on the Malonic Acid-Cu(II) System: Insights through Supramolecular Interactions and Photoresponse Properties

ACS Omega. 2019 Dec 31;5(1):460-470. doi: 10.1021/acsomega.9b02971. eCollection 2020 Jan 14.

Authors

Tripti Mandal¹, Arka Dey^{2

1}, Saikat Kumar Seth¹, Joaquín Ortega-Castro³, Arnold L Rheingold⁴, Partha Pratim Ray¹, Antonio Frontera³, Subrata Mukhopadhyay¹

Affiliations

¹ Department of Chemistry and Department of Physics, Jadavpur University, Kolkata 700032, India.
² Department of Condensed Matter Physics and Material Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sec. III, Salt Lake, Kolkata 700106, India.
³ Departament de Química, Universitat de les Illes Balears, Crta. de Valldemossa km 7.5, 07122 Palma de Mallorca (Baleares), Spain.
⁴ Department of Chemistry and Biochemistry, University of California, San Diego, Urey Hall 5128, 9500 Gilman Drive, La Jolla, California 92093-0358, United States.

Abstract

Two Cu(II)-malonate complexes with 2-amino-4-methylpyridine (complex 1) and 2-aminopyrimidine (complex 2) auxiliary ligands were synthesized, and their single-crystal X-ray diffraction structures were established. Change in the auxiliary ligand exhibits substantial structural variation in the present complexes. Complex 1 shows a one-dimensional anionic copper-malonate moiety connected by the malonate bridge, whereas complex 2 is a mononuclear one. For both the complexes, auxiliary ligands are attached with the Cu-malonate moiety through various noncovalent interactions. Optical band gap, electrical conductivity, and photosensitivity of complexes 1 and 2 were measured, but the values of electrical parameters of the complexes significantly differ from each other. However, the magnitudes of electrical parameters increase several times for both the complexes when they are exposed under visible light, though the values of light sensing parameters of complex 1 were found to be higher than those of complex 2. Density functional theory calculations for complex 1 were carried out to support the experimental result.