Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 11, 2020
Previous Article Next Article

Excitation wavelength dependent emission of silver(i) complexes with a pyrimidine ligand

Author affiliations

Abstract

Silver(I) complexes with 2-amino-4-phenyl-6-methylpyrimidine (L), [Ag3L2(H2O)0.55(NO3)3]n (1) and [Ag2L2(PPh3)2(NO3)2] (2), have been synthesized and structurally characterized. In the solid state the free ligand L demonstrates dual fluorescence: a high energy band at 375 nm is the emission of the monomer L while a low-energy band at 450 nm can be attributed to the emission of the tautomeric dimer, L2-imino, formed in the excited state double proton transfer (ESDPT) process. In the solid state the complexes demonstrate excitation wavelength dependent photoluminescence originating from three emission mechanisms (hereafter abbreviated as A, B and C for complex 1; A′, B′ and C′ for complex 2). The spectroscopic and computational results reveal that these emission mechanisms can be assigned to metal + nitrate anion to ligand L charge transfer phosphorescence (mechanisms A and A′), excimer 1π–π* fluorescence (mechanism B), fluorescence of L2-imino dimeric units formed due to ESDPT (mechanism B′) and ligand-centered 1π–π*/1n–π* fluorescence (mechanisms C and C′). The luminescence of complex 1 at λex = 340 nm shows thermochromic behavior; the emission color dramatically changes from blue-green at 77 K to yellowish green at 175 K and white at 300 K.

Graphical abstract: Excitation wavelength dependent emission of silver(i) complexes with a pyrimidine ligand

Back to tab navigation

Supplementary files

Article information


Submitted
26 Feb 2020
Accepted
23 Apr 2020
First published
23 Apr 2020

Inorg. Chem. Front., 2020,7, 2212-2223
Article type
Research Article

Excitation wavelength dependent emission of silver(I) complexes with a pyrimidine ligand

N. A. Shekhovtsov, K. A. Vinogradova, A. S. Berezin, T. S. Sukhikh, V. P. Krivopalov, E. B. Nikolaenkova and M. B. Bushuev, Inorg. Chem. Front., 2020, 7, 2212
DOI: 10.1039/D0QI00254B

Social activity

Search articles by author

Spotlight

Advertisements