Nonlinear-optical studies of molybdenum metal organics

Abstract

We have measured the third-order susceptibility, X((3)), versus concentration for a number of molybdenum-based metal-organic complexes in solution, using independent degenerate four-wave mixing and Z-scan techniques. Good agreement was obtained between the degenerate four-wave mixing and Z-scan measurements. The variation of X((3)) with concentration yielded the second-order hyperpolarizability gamma. A close correlation was observed between the number of delocalized pi electrons and the magnitude of gamma.

Iterative Synthesis of Oligoynes Capped by a Ru2(ap)4-terminus and Their Electrochemical and Optoelectronic Properties

“…52 Both second-and thirdorder nonlinear optical effects have been demonstrated in organometallic compounds, as they have desired characteristics such as low-energy electronic transitions and large molecular hyperpolarizabilities. [53][54][55][56] Transition metal compounds with short polyynyl ligands are commonly obtained via the transmetalation reaction between {M}-X and M′C 2k Y (X ) halide and M′ ) Li, SnR′ 3 ). 8,57,58 Utility of this reaction in the preparation of {M}-C 2k Y with k g 4 became less practical because of decreasing thermal stability of HC 2k Y with an increasing k. Hence, metal compounds bearing long polyynyl ligands (C 2(m+n) Y) are prepared by either the Cadiot-Chodkiewicz reaction between {M}-C 2m Cu and BrC 2n Y [59][60][61][62][63][64] or the reaction between {M}-CtC-Au(PR 3 ) and XCtCY that is driven by the elimination of XAu(PR 3 ) (X ) halide).…”

“…Application in nonlinear optical (NLO) materials is another active area of metal-alkynyl research. − In a broader scope, organic−inorganic hybrid materials have been a motif for nonlinear optical properties in a variety of applications. , Also, the immense interest in metal-organic nanocomposite materials has attracted interest in the fields of sensor and eye protection as well as magneto-optical effects . Both second- and third-order nonlinear optical effects have been demonstrated in organometallic compounds, as they have desired characteristics such as low-energy electronic transitions and large molecular hyperpolarizabilities. − …”