Abstract
Electronic emission spectral characteristics of melamine solution have been investigated by processing its steady-state emission spectrum with the second derivative method. It was found that the emission spectrum can be fitted into three separated Gaussian curves. The decay-associated emission spectra of lifetime τ 1 can be fitted to be one Gaussian curve, and that of lifetime τ 2 can be fitted into the other two Gaussian curves. These three Gaussian curves correspond to the steady-state emission spectra l, showing that melamine has two fluorescent structures. The density functional theory (DFT) method was used to optimize the structures of the weak interaction clusters C 3H 6N 6–(H 2O) n ( n = 1–6). The structures of those clusters were obtained, and the energies of HOMO and LUMO were analyzed. It is found that the theoretical model C 3H 6N 6–(H 2O) 4 matches well with the experiment when the bonding number n is 4.
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Schedule a callMore From: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
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