357219-52-4Relevant academic research and scientific papers
Star-shaped push-pull compounds having 1,3,5-triazine cores
Meier, Herbert,Karpuk, Elena,Holst, Hans Christof
, p. 2609 - 2617 (2006)
The 1,3,5-triazines 9-11 having OPV chains in the 2-, 4- and 6-position represent star-shaped compounds which exhibit strong push-pull effects. Their long-wavelength absorption S0 → S1 is characterized by an intramolecular charge tra
Synthesis, fluorescence, and two-photon absorption of a series of elongated rodlike and banana-shaped quadrupolar fluorophores: A comprehensive study of structure-property relationships
Mongin, Olivier,Porres, Laurent,Charlot, Marina,Katan, Claudine,Blanchard-Desce, Mireille
, p. 1481 - 1498 (2008/02/04)
An extensive series of push-push and pull-pull derivatives was prepared from the symmetrical functionalization of an ambivalent core with conjugated rods made from arylene-vinylene or arylene-ethynylene building blocks, bearing different acceptor or donor
Two-photon absorption in three-dimensional chromophores based on [2.2]-paracyclophane
Bartholomew, Glenn P.,Rumi, Mariacristina,Pond, Stephanie J. K.,Perry, Joseph W.,Tretiak, Sergei,Bazan, Guillermo C.
, p. 11529 - 11542 (2007/10/03)
A series of α,ω-bis donor substituted oligophenylenevinylene dimers held together by the [2.2]-paracyclophane core were synthesized to probe how the number of repeat units and through-space delocalization influence two-photon absorption cross sections. Specifically, the paracyclophane molecules are tetra(4,7,12,15)-(4′-dihexylaminostyryl)[2.2]paracyclophane (3R D), tetra(4,7,12,15)-(4″-(4′-dihexylaminostyryl)styryl) [2.2]paracyclophane (5RD), and tetra(4,7,12,15)-(4?-(4″- (4′-dihexylaminostyryl)styryl)styryl)[2.2]paracyclophane (7RD). The compounds bis(1,4)-(4′-dihexylaminostyryl)benzene (3R) and bis(1,4)-(4″-(4′-dihexylaminostyryl)styryl)benzene (5R) were also synthesized to reveal the properties of the "monomeric" counterparts. The two-photon absorption cross sections were determined by the two-photon induced fluorescence method using both femtosecond and nanosecond pulsed lasers as excitation sources. While there is a red shift in the linear absorption spectra when going from the "monomer" chromophore to the paracyclophane "dimer" (i.e., 3R → 3RD, 5R → 5RD), there is no shift in the two-photon absorption maxima. A theoretical treatment of these trends and the dependence of transition dipole moments on molecular structure rely on calculations that interfaced time-dependent density functional theory (TDDFT) techniques with the collective electronic oscillator (CEO) program. These theoretical and experimental results indicate that intermolecular interactions can strongly affect Bu states but weakly perturb Ag states, due to the small dipole-dipole coupling between Ag states on the chromophores in the dimer.
Propeller-shaped molecules with giant off-resonance optical nonlinearities
Brunel,Ledoux,Zyss,Blanchard-Desce
, p. 923 - 924 (2007/10/03)
Propeller-shaped molecules based on a triphenylbenzene crux bearing three oligomeric phenylenevinylene branches have been designed; very large first-order hyperpolaris-abilities (up to ∥β∥ = 800 10-30 esu) were obtained while maintaining wide t
