Oligophosphine-thiocyanate Copper(I) and Silver(I) Complexes and Their Borane Derivatives Showing Delayed Fluorescence.

The series of chelating phosphine ligands, which contain bidentate P (bis[(2-diphenylphosphino)phenyl] ether, DPEphos; 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene, Xantphos; 1,2-bis(diphenylphosphino)benzene, dppb), tridentate P (bis(2-diphenylphosphinophenyl)phenylphosphine), and tetradentate P (tris(2-diphenylphosphino)phenylphosphine) ligands, was used for the preparation of the corresponding dinuclear [M(μ-SCN)P] (M = Cu, 1, 3, 5; M = Ag, 2, 4, 6) and mononuclear [CuNCS(P/P)] (7, 9) and [AgSCN(P/P)] (8, 10) complexes. The reactions of P with silver salts in a 1:2 molar ratio produce tetranuclear clusters [Ag(μ-SCN)(t-SCN)(P)] (11) and [Ag(μ-SCN)(P)] (12). Complexes 7-11 bearing terminally coordinated SCN ligands were efficiently converted into derivatives 13-17 with the weakly coordinating SCN:B(CF) isothiocyanatoborate ligand.

A silver metal complex as a luminescent probe for enzymatic sensing of glucose in blood plasma and urine.

In this work, we present a facile preparation of a paper-based glucose assay for rapid, sensitive, and quantitative measurement of glucose in blood plasma and urine. Two copper phosphorescent complexes [Cu(2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline)(2,6-dimethylphenylisocyanide)2][B(C6H3(CF3)2)4] (Cu1) and [Cu(2,9-dimethyl-1,10-phenanthroline)(2,6-dimethylphenylisocyanide)2][B(C6H3(CF3)2)4] (Cu2) and a new silver congener [Ag(P3)CNAg(P3)][B(C6H3(CF3)2)4] (Ag3) (P3 = PPh2C6H4-PPh-C6H4PPh2 [bis(o-diphenylphosphinophenyl)phenylphosphine]) have been synthesized and their oxygen sensing abilities were investigated. The dimetallic phosphine-based Ag3 complex, having a high oxygen sensing ability, was employed as an efficient signal transducer in enzymatic reactions to recognize blood plasma glucose and urine glucose, which provided a wide linear response for a concentration range between 1.

Adjustable coordination of a hybrid phosphine-phosphine oxide ligand in luminescent Cu, Ag and Au complexes.

A potentially tridentate hemilabile ligand, PPh2-C6H4-PPh(O)-C6H4-PPh2 (P(3)O), has been used for the construction of a family of bimetallic complexes [MM'(P(3)O)2](2+) (M = M' = Cu (1), Ag (2), Au (3); M = Au, M' = Cu (4)) and their mononuclear halide congeners M(P(3)O)Hal (M = Cu (5-7), Ag (8-10)). Compounds 1-10 have been characterized in the solid state by single-crystal X-ray diffraction analysis to reveal a variable coordination mode of the phosphine-oxide group of the P(3)O ligand depending on the preferable number of coordination vacancies on the metal center. According to the theoretical studies, the interaction of the hard donor P[double bond, length as m-dash]O moiety with d(10) ions becomes less effective in the order Cu > Ag > Au.

Luminescent Triphosphine Cyanide d(10) Metal Complexes.

Coinage metal cyanides efficiently react with a triphosphine. PPh2C6H4-PPh-C6H4PPh2 (P(3)). to give the complexes M(P(3))CN, where M = Cu (1), Ag (2), and Au (3), which can further interact with coordinatively unsaturated metal centers [M(P(3))](+) to give the homobimetallic [(P(3))M-CN-M(P(3))](+)X(-) [M = Cu (4a with X(-) = CF3SO3(-) and 4b with X(-) = BF4(-)), Ag (5)] or heterometallic [(P(3))Au-CN-Ag(P(3))](+) (6) species.

Alkynyl triphosphine copper complexes: synthesis and photophysical studies.

A rigid triphosphine PPh2C6H4-PPh-C6H4PPh2 () reacted with Cu(+) and a stoichiometric amount of terminal alkyne under basic conditions to give a family of copper(i) alkynyl compounds [Cu()C[triple bond, length as m-dash]CR]. The number of terminal -C[triple bond, length as m-dash]CH groups in the starting ligand determines the nuclearity of the resulting complexes giving mono- (, R = Ph; , R = C6H4OMe; , R = C6H4NO2; , R = C6H4CF3; , R = 2-pyridyl), di- (R = -(C6H4)n-, n = 1 (), n = 2, (), n = 3 ()) and trinuclear complexes (, R = 1,3,5-(C6H4)3-C6H3; , R = 1,3,5-(C6H4-4-C2C6H4)3-C6H3). In all the complexes the Cu(i) centers are found in a distorted tetrahedral environment that is achieved by tridentate coordination of the ligand and σ-bonding to the alkynyl function.