Self-assembly of silver nanoparticles through functionalization with coumarin-thiazole fused-ring thiol

Saurav Paul; Bimal B Chakraborty; Siddique Anwar; Satya B Paul; Sudip Choudhury

doi:10.1016/j.heliyon.2020.e03674

Self-assembly of silver nanoparticles through functionalization with coumarin-thiazole fused-ring thiol

Heliyon. 2020 Apr 8;6(4):e03674. doi: 10.1016/j.heliyon.2020.e03674. eCollection 2020 Apr.

Authors

Saurav Paul¹, Bimal B Chakraborty¹, Siddique Anwar¹, Satya B Paul¹, Sudip Choudhury^{1

2}

Affiliations

¹ Department of Chemistry, Assam University, Silchar-788011, India.
² Centre for Studies in Soft Matter, Department of Chemistry, Assam University, Silchar-788011, India.

Abstract

Self-assembly of nanoscale building blocks plays a critical role for the edifice of functional nanomaterials. In this work coumarin based fused-ring heterocyclic thiol functionalized silver nanoparticle exhibiting large self-assembly is reported. The particles spontaneously self-organise towards the formation of larger superstructures, yet still retaining their individual particle morphology (~10nm). The π-stacking behaviour of coumarin based fused ring aromatic skeleton seems to play the key role for the induction of dense assembly in this hybrid nanoparticles. In the present work the anchoring group (thiol) is directly attached to the aromatic framework of the Coumarin-thiazole fused-ring, for easier electron flow between the metal and the aromatic ligand. The synthesized materials have been characterized by UV-Vis, Fluorescence, XRD, TEM, SAED, IR, ¹H and ¹³C NMR. The synthesis of the ligand and process of functionalization is simple and easily reproducible.

Keywords: Coumarin; Fused-ring thiol; Materials chemistry; Organic chemistry; Self-assembly; Thiazole.