Premium
Highly Efficient and Thermally Stable Electro‐Optical Dendrimers for Photonics
Author(s) -
Ma H.,
Liu S.,
Luo J.,
Suresh S.,
Liu L.,
Kang S.H.,
Haller M.,
Sassa T.,
Dalton L.R.,
Jen A.K.Y.
Publication year - 2002
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/1616-3028(20020916)12:9<565::aid-adfm565>3.0.co;2-8
Subject(s) - dendrimer , chromophore , materials science , poling , intermolecular force , surface modification , polymer , dipole , nonlinear optical , nonlinear optics , nanotechnology , molecule , polymer chemistry , optoelectronics , photochemistry , organic chemistry , chemistry , optics , nonlinear system , laser , physics , quantum mechanics , dielectric , composite material , ferroelectricity
After a brief review on electro‐optical (EO) polymers, the recent development of EO dendrimers is summarized. Both single‐ and multiple‐dendron‐modified nonlinear optical (NLO) chromophores in the guest–host polymer systems showed a very significant enhancement of poling efficiency (up to a three‐fold increase) due to the minimization of intermolecular electrostatic interactions among large dipole moment chromophores through the dendritic effect. Moreover, multiple NLO chromophore building blocks can also be placed into a dendrimer to construct a precise molecular architecture with a predetermined chemical composition. The site‐isolation effect, through the encapsulation of NLO moieties with dendrons, can greatly enhance the performance of EO materials. A very large EO coefficient ( r 33 = 60 pm/V at 1.55 μm) and high temporal stability (85 °C for more than 1000 h) were achieved in a NLO dendrimer (see Figure) through the double‐end functionalization of a three‐dimensional phenyl‐tetracyanobutadienyl (Ph‐TCBD)‐containing NLO chromophore with thermally crosslinkable trifluorovinylether‐containing dendrons.