Abstract
Using the methods of electronic absorption and emission spectroscopy, we have studied the optical properties of cyclometalated [Pd(C∧N)En]CH3COO and [Rh(C∧N)2En]Cl complexes of 2-(4-biphenylyl)-6-phenylbenzoxazole luminophore with ethylenediamine. We have shown that, along with a bathochromic shift of intraligand spin-allowed π-π* optical transitions by 1000–1800 cm−1, complexes are characterized by the occurrence of long-wavelength bands of a mixed nature (intraligand-metal-ligand charge transfer) in the range of 369—392 nm and by competing intraligand fluorescence (419–423 nm) and phosphorescence (511–532 nm) processes under low-temperature (77 K) photoexcitation.
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