Study Of The The Nonlinear Optical Properties Of The Metalloaryl-acetylides And Ferrocene-containing Metalloporphyrins

Organometallic complex is an important type of third-order nonlinear optical(NLO)material with large conjugated system,and the NLO property can be adjusted by introducing different functional groups to the conjugated system or introducing different metal ions.The following works were carried out mainly on the nonlinear optical properties of organometallic complex:1:Six 9-(4-acetylene phenyl)imine fluorene-based Pt aromatic alkyne complexes were synthesized.The photophysical and photochemical properties of these compounds were studied.The HOMO and LUMO orbital properties were calculated using time-dependent density method(TD-DFT).The nonlinear optical properties of the title compounds were determined by open aperture Z-Scan technique(λ=532nm,pulse width 21 ps).The results show that the nonlinear absorption of Pt aromatic alkyne complexes is due to reverse saturable absorption.The increase of the metal content isn’t benefit to the nonlinear absorption of Pt complex for the ps pulse laser due to the heavy atom effect,which increases the systematic crossing speed of the molecules from the first singlet excited state to the first triplet excited state.2:The relationship between structure and properties of six ferrocene-containing metalloporphyrin complexes(P-Fc and M-P-Fc,M=Co,Cu,Ni,Pd,Zn,synthesized by other students of our group)were studied.The property of HOMO and LUMO orbitals and the first-order hyperpolarizability were calculated using TD-DFT method with exchange correlation function B3LYP.The nonlinear optical properties of title complexes were determined by open aperture Z-scanning technique(λ=532 nm,pulse width 21 ps).The experimental results proved that P-Fc,Cu-P-Fc and Ni-P-Fc show saturated absorption characteristics,Co-P-Fc,Zn-P-Fc and Pd-P-Fc show excited state absorption characteristics.3:The research mainly focuses on nonlinear optical properties of five mercury aromatic alkynes(synthesized by other students in our group)have been studied.The electronic properties and the first-order hyperpolarizability of the complexes were calculated using TD-DFT method with exchange correlation function B3PW91,and the first order hyperpolarizability of the compound estimated by the two-level formula is consistent with that previously reported.The nonlinear optical properties of the complexes were studied by open aperture Z-Scanning technique(λ=532 nm,pulse width 21 ps),it is found that different complexes exhibit different nonlinear absorption characteristics.