Synthesis and photophysics of organometallic compounds of the novel tetradentate phosphine alpha,alpha,alpha',alpha'-tetrakis (Diphenylphosphino)-p-xylene
Abstract
Novel bidentate and tridentate phosphines are synthesized and characterized. The synthetic methods are then used in the synthesis of a novel tetradentate phosphine $\alpha,\alpha,\alpha\sp\prime,\alpha\sp\prime$-tetrakis-(diphenylphosphino)-p-xylene (dppx) 7. Compound 7 was synthesized by both a single and multi-step method. The electrochemistry and possible oxidation of dppx to a xylylene derivative is also discussed. The chelated organometallic binuclear compounds (CO)$\sb6$Fe$\sb2$(dppx), 10, Pt$\rm\sb2Cl\sb4(dppx),$ 11, and Pd$\rm\sb2Cl\sb4(dppx),$ 12, are synthesized, characterized, and their spectroscopy reported. The alkali metal dithiolates of: 1-(ethoxycarbonyl)-1-cyano-ethylene-2,2-dithiolate, 1,1-dicyano-2,2-dithiolate; and 1,2-benzenedithiolate have been reacted with compounds 11 and 12 to yield the corresponding six bimetallic dithiolate derivatives, all of which are bridged by the chelating tetradentate phosphine dppx, 7. The platinum dithiolates compounds of dppx 15, 16, and 17, unlike their palladium analogs all show structureless emissions at 77 K. The photophysics of these compounds, under cryogenic conditions, are investigated. The lifetime and quantum yields values for these three complexes are reported.
Degree
Ph.D.
Advisors
Kubiak, Purdue University.
Subject Area
Chemistry
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