Experimental and theoretical spectral properties of ethyl 2-(7-hydroxy-2-oxo-2H-chromen-4-yl)acetate doped sol-gel materials:new materials with potential optical application

摘要

Silica xerogels and monoliths,containing ethyl 2-(7-hydroxy-2-oxo-2H-chromen-4-yl)acetate(K4)or Sm~(3+)ions and K4 are prepared by sol-gel technique.NMR investigations,UV/Vis,IR-and luminescence spectral properties of K4 in solution and in monoliths are presented.The IR-spectroscopic properties of the prepared sol-gel materials are examined by applying the reduced-difference procedure to non-polarized IR-spectra.The results show that the sol-gel medium did not interact with K4 as well as in the presence of Sm~(3+)ions the K4 form a [Sm(L)2(H2O)4] x(NO3)3 complex in the matrix.