Terenziani, Francesca; Mongin, Olivier; Katan, Claudine; Bhattula, Bharath Kumar Goud; Blanchard-Desce, Mireille published the artcile< Effects of dipolar interactions on linear and nonlinear optical properties of multichromophore assemblies: a case study>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is multichromophore assembly nonlinear optical property effect dipolar interaction.
Interchromophore interactions in flexible multidipolar structures for nonlinear optics were addressed by a combined exptl. and theor. study on two series of one-, two-, and three-chromophore systems in which identical push-pull chromophores are assembled through covalent and flexible linkers in close proximity. The photophys. and nonlinear optical properties (quadratic hyperpolarizability) of the multichromophore systems were investigated and compared to those of the monomeric chromophores. Multimers have larger dipole moments than their monomeric analogs, i.e., the dipolar subchromophores self-orient within the multimeric structures. This effect was found to depend on the intersubchromophore distance in a nontrivial manner, which confirms that mol. engineering of such flexible systems is more complex than in completely geometrically controlled systems. Elec.-field-induced second-harmonic generation (EFISHG) measurements in solution revealed increased figures of merit as compared to the monomeric analog. This effect increases with increasing number and polarity of the individual subchromophores in the nanoassembly and increasing spacing between dipolar subchromophores. Exptl. results are interpreted by a theor. model for interacting polar and polarizable chromophores. The properties of multidipolar assemblies are shown to be related to the relative orientation of chromophores, which is imposed by interchromophore interactions. The supramol. structure is thus a result of self-organization. The proposed theor. model was also used to predict the properties of multichromophore structures made up of more polar and polarizable push-pull chromophores, and showed that stronger interchromophore interactions can heavily affect the individual optical responses. This suggests new routes for engineering highly NLO responsive multichromophore systems.
Chemistry – A European Journal published new progress about Chromophores. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.
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