X-shaped electro-optic chromophore with remarkably blue-shifted optical absorption. Synthesis, characterization, linear/nonlinear optical properties, self-assembly, and thin film microstructural characteristics

Hu Kang, Guennadi Evmenenko, Pulak Dutta, Koen Clays, Kai Song, Tobin J Marks

Research output: Contribution to journalArticle

126 Citations (Scopus)

Abstract

A novel type of "X-shaped" two-dimensional electro-optic (EO) chromophore with extended conjugation has been synthesized and characterized. This chromophore is found to exhibit a remarkably blue-shifted optical maximum (357 nm in CH2Cl2) while maintaining a very large first hyperpolarizability (β). Hyper-Rayleigh Scattering (HRS) measurements at 800 nm provide a βzzz value of 1840 × 10-30 esu. Self-assembled thin films of this chromophore were fabricated via a layer-by-layer chemisorptive siloxane-based approach. The chromophoric multilayers have been characterized by transmission optical spectroscopy, advancing contact angle measurements, synchrotron X-ray reflectivity, atomic force microscopy, and angle-dependent polarized second harmonic generation spectroscopy. The self-assembled chromophoric films exhibit a dramatically blue-shifted optical maximum (325 nm) while maintaining a large EO response (χ(2)333 ∼ 232 pm/V at 1064 nm; r33 ∼ 45 pm/V at 1310 nm). This work demonstrates an attractive approach to developing EO materials offering improved nonlinearity-transparency trade-offs.

Original languageEnglish
Pages (from-to)6194-6205
Number of pages12
JournalJournal of the American Chemical Society
Volume128
Issue number18
DOIs
Publication statusPublished - May 10 2006

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Chromophores
Electrooptical effects
Self assembly
Light absorption
Spectrum Analysis
Optical properties
Siloxanes
Thin films
Synchrotrons
Atomic Force Microscopy
Rayleigh scattering
X-Rays
Angle measurement
Harmonic generation
Transparency
Contact angle
Atomic force microscopy
Multilayers
Spectroscopy
X rays

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

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title = "X-shaped electro-optic chromophore with remarkably blue-shifted optical absorption. Synthesis, characterization, linear/nonlinear optical properties, self-assembly, and thin film microstructural characteristics",
abstract = "A novel type of {"}X-shaped{"} two-dimensional electro-optic (EO) chromophore with extended conjugation has been synthesized and characterized. This chromophore is found to exhibit a remarkably blue-shifted optical maximum (357 nm in CH2Cl2) while maintaining a very large first hyperpolarizability (β). Hyper-Rayleigh Scattering (HRS) measurements at 800 nm provide a βzzz value of 1840 × 10-30 esu. Self-assembled thin films of this chromophore were fabricated via a layer-by-layer chemisorptive siloxane-based approach. The chromophoric multilayers have been characterized by transmission optical spectroscopy, advancing contact angle measurements, synchrotron X-ray reflectivity, atomic force microscopy, and angle-dependent polarized second harmonic generation spectroscopy. The self-assembled chromophoric films exhibit a dramatically blue-shifted optical maximum (325 nm) while maintaining a large EO response (χ(2)333 ∼ 232 pm/V at 1064 nm; r33 ∼ 45 pm/V at 1310 nm). This work demonstrates an attractive approach to developing EO materials offering improved nonlinearity-transparency trade-offs.",
author = "Hu Kang and Guennadi Evmenenko and Pulak Dutta and Koen Clays and Kai Song and Marks, {Tobin J}",
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T1 - X-shaped electro-optic chromophore with remarkably blue-shifted optical absorption. Synthesis, characterization, linear/nonlinear optical properties, self-assembly, and thin film microstructural characteristics

AU - Kang, Hu

AU - Evmenenko, Guennadi

AU - Dutta, Pulak

AU - Clays, Koen

AU - Song, Kai

AU - Marks, Tobin J

PY - 2006/5/10

Y1 - 2006/5/10

N2 - A novel type of "X-shaped" two-dimensional electro-optic (EO) chromophore with extended conjugation has been synthesized and characterized. This chromophore is found to exhibit a remarkably blue-shifted optical maximum (357 nm in CH2Cl2) while maintaining a very large first hyperpolarizability (β). Hyper-Rayleigh Scattering (HRS) measurements at 800 nm provide a βzzz value of 1840 × 10-30 esu. Self-assembled thin films of this chromophore were fabricated via a layer-by-layer chemisorptive siloxane-based approach. The chromophoric multilayers have been characterized by transmission optical spectroscopy, advancing contact angle measurements, synchrotron X-ray reflectivity, atomic force microscopy, and angle-dependent polarized second harmonic generation spectroscopy. The self-assembled chromophoric films exhibit a dramatically blue-shifted optical maximum (325 nm) while maintaining a large EO response (χ(2)333 ∼ 232 pm/V at 1064 nm; r33 ∼ 45 pm/V at 1310 nm). This work demonstrates an attractive approach to developing EO materials offering improved nonlinearity-transparency trade-offs.

AB - A novel type of "X-shaped" two-dimensional electro-optic (EO) chromophore with extended conjugation has been synthesized and characterized. This chromophore is found to exhibit a remarkably blue-shifted optical maximum (357 nm in CH2Cl2) while maintaining a very large first hyperpolarizability (β). Hyper-Rayleigh Scattering (HRS) measurements at 800 nm provide a βzzz value of 1840 × 10-30 esu. Self-assembled thin films of this chromophore were fabricated via a layer-by-layer chemisorptive siloxane-based approach. The chromophoric multilayers have been characterized by transmission optical spectroscopy, advancing contact angle measurements, synchrotron X-ray reflectivity, atomic force microscopy, and angle-dependent polarized second harmonic generation spectroscopy. The self-assembled chromophoric films exhibit a dramatically blue-shifted optical maximum (325 nm) while maintaining a large EO response (χ(2)333 ∼ 232 pm/V at 1064 nm; r33 ∼ 45 pm/V at 1310 nm). This work demonstrates an attractive approach to developing EO materials offering improved nonlinearity-transparency trade-offs.

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