Phosphorescence of a ruthenium(II) hydride-carbonyl complex with 3-hydroxy-2-quinoxalinecarboxylic acid as a co-ligand

Synthesis and Structure of Ru(II) Complexes of Thiosemicarbazone: Highly Selective Catalysts for Oxidative Scission of Olefins to Aldehydes

“…Further, the Ru(1)– P(1) and Ru(1)– P(2) bond length of 2.3607(8) and 2.3571(7)Å. The two Ru–P bond lengths are similar and comparable with those found in other reported ruthenium complexes containing PPh 3 . Since all the complexes display similar spectral properties, the other two complexes are found to have similar structure to that of [RuH(CO)(PPh 3 ) 2 (L 2 )] (2).…”

Tuning ESIPT-coupled luminescence by expanding π-conjugation of a proton acceptor moiety in ESIPT-capable zinc(ii) complexes with 1-hydroxy-1H-imidazole-based ligands

“…To date, there are fewer than 30 references dealing with the synthesis and investigation of such complexes. 77–104 The ESIPT-capable ligands used for the synthesis of these complexes are various carboxylic acids (2,5-dihydroxyterepthalic acid, 3-hydroxy-2-quinoxalinecarboxylic acid), the derivatives of 2-(1 H -imidazol-2-yl)phenol, 1-(1 H -imidazo[4,5- f ][1,10]phenanthrolin-2-yl)naphthalen-2-ol, 77,78 4-(1 H -pyrazol-1-yl)-6-(2-hydroxyphenyl)pyrimidine 103,104 and 1-hydroxy-2-(pyridin-2-yl)-1 H -imidazole. 105,106 Whereas 2,5-dihydroxyterepthalic acid and the derivatives of 2-(1 H -imidazol-2-yl)phenol decorated with carboxylic groups are known to form metal–organic frameworks due to the coordination of the carboxylato groups to metal ions, other ligands feature N , N - and N , O -chelating metal binding sites which suit the formation of chelate complexes.…”

N-Hydroxy–N-oxide photoinduced tautomerization and excitation wavelength dependent luminescence of ESIPT-capable zinc(ii) complexes with a rationally designed 1-hydroxy-2,4-di(pyridin-2-yl)-1H-imidazole ESIPT-ligand

“…20 references. 38,66–88 For the most part, these complexes are based on aromatic carboxylic acids ( e.g. 3-hydroxy-2-quinoxalinecarboxylic acid, 2,5-dihydroxyterepthalic acid) and 2-(1 H -imidazol-2-yl)phenol derivatives decorated by aromatic carboxylic acid groups.…”

“…3-hydroxy-2-quinoxalinecarboxylic acid, 2,5-dihydroxyterepthalic acid) and 2-(1 H -imidazol-2-yl)phenol derivatives decorated by aromatic carboxylic acid groups. 66–88 Metal ions used in the synthesis of ESIPT-complexes are mostly the ions of divalent metals of the second and twelfth groups of the periodic table (Mg 2+ , Ca 2+ , Sr 2+ , Ba 2+ , Zn 2+ , Cd 2+ ) and the ions of trivalent lanthanides (Sm 3+ , Eu 3+ , Tb 3+ , Gd 3+ , Er 3+ , Nd 3+ ). Metal–organic frameworks (MOFs) based on divalent ions show fluorescence.…”