Synthesis of New Push-Pull Unsymmetrically Substituted Styryl Metallophthalocyanines: Targets for Nonlinear Optics

Abstract

Following our studies on styryl phthalocyanines with ed for studying the influence of the position and electronic character of the substituents and the role of the central metal extended conjugation, we report here the synthesis and characterization of new push-pull unsymmetrically subatom on their optical properties. stituted styryl phthalocyanines 2-6. They have been preparsignificantly enhanced by increasing the number of polari-

Estudio Commputacional De Las Propiedades Ópticas No Lineales De Segundo Orden en Ftalocianinas De Cobre Substituidas Con Ligandos Donador-Aceptor

“…We have introduced four derivatives of copper phthalocyanine with donor-acceptor ligands studied in other works [9][10][11][12] . As shown in figure 1, four derivatives have been considered in this work; all of them have different positions of pair multiples of 4-nitrophenylethylvinyl as the acceptor group and cyanide as the donor group, those were denoted as 1, 2, 3 and 4, respectively.…”

Strong Two-Photon Absorption in Push−Pull Phthalocyanines: Role of Resonance Enhancement and Permanent Dipole Moment Change upon Excitation

“…The spectra consist of two sets of bands, broader B- (Soret) bands peaking at 350 nm and narrower Q-bands at 550−750 nm, the latter showing at least five partially overlapping transitions. Note that in nonpolar solvents and matrixes, such as n -octane, CCl 4 , and polyethylene, the Q-bands become better resolved than in more polar solvents, such as chloroform. , The B-band remains virtually unresolved with a readily apparent shoulder on its red side, peaking at ∼430 nm.

2 Absorption (lower panel) and corrected fluorescence (upper panel) spectra of (a) NSPc and (b) NPEPc in octane.

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The optical characterization of metal-mediated aggregation behaviour of amphiphilic Zn( ii ) phthalocyanines

“…24,32,33 Similar behaviour was also observed for asymmetrical metallophthalocyanines which were substituted with electron releasing and electron withdrawing substituting groups. 30,[34][35][36] Another reason for the splitting of the Q-band can be the aggregation of molecules. 34,37,38 Since Pcs have an extensively planar aromatic p-system, aggregation is highly expected.…”