Photoconversion of Spiropyran to Merocyanine in a Monolayer Observed using Nanosecond Pump-Probe Brewster Angle Reflectometry

Bernhard Siebenhofer; Sergey Gorelik; Anton V. Sadovoy; Martin J. Lear; Hong Yan Song; Christoph Nowak; Jonathan Hobley

doi:10.1071/CH12093

Photoconversion of Spiropyran to Merocyanine in a Monolayer Observed using Nanosecond Pump-Probe Brewster Angle Reflectometry

Bernhard Siebenhofer, Sergey Gorelik, Anton V. Sadovoy, Martin J. Lear, Hong Yan Song, Christoph Nowak, Jonathan Hobley

Nanyang Technological University

Research output: Contribution to journal › Article › peer-review

Abstract

A new apparatus for nanosecond-time-resolved Brewster angle reflectometry is described that can be used to measure transient angle-resolved reflectivity changes in thin films and monolayers in a single pulsed laser shot. The system was used to observe nanosecond time-resolved photodynamics in a spiropyran monolayer at the air-water interface. After UV excitation the spiropyran converted to its merocyanine form in two stages. One within a timescale close to the instrument time resolution of a few tens of nanoseconds whereas the second stage occurred over a few hundred nanoseconds.

Original language	English
Pages (from-to)	283-289
Number of pages	7
Journal	Australian Journal of Chemistry
Volume	65
Issue number	65
DOIs	https://doi.org/10.1071/CH12093
Publication status	Published - 2012

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Biosensor Technologies

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title = "Photoconversion of Spiropyran to Merocyanine in a Monolayer Observed using Nanosecond Pump-Probe Brewster Angle Reflectometry",

abstract = "A new apparatus for nanosecond-time-resolved Brewster angle reflectometry is described that can be used to measure transient angle-resolved reflectivity changes in thin films and monolayers in a single pulsed laser shot. The system was used to observe nanosecond time-resolved photodynamics in a spiropyran monolayer at the air-water interface. After UV excitation the spiropyran converted to its merocyanine form in two stages. One within a timescale close to the instrument time resolution of a few tens of nanoseconds whereas the second stage occurred over a few hundred nanoseconds.",

author = "Bernhard Siebenhofer and Sergey Gorelik and Sadovoy, {Anton V.} and Lear, {Martin J.} and Song, {Hong Yan} and Christoph Nowak and Jonathan Hobley",

year = "2012",

doi = "10.1071/CH12093",

language = "English",

volume = "65",

pages = "283--289",

journal = "Australian Journal of Chemistry",

issn = "0004-9425",

publisher = "CSIRO",

number = "65",

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T1 - Photoconversion of Spiropyran to Merocyanine in a Monolayer Observed using Nanosecond Pump-Probe Brewster Angle Reflectometry

AU - Siebenhofer, Bernhard

AU - Gorelik, Sergey

AU - Sadovoy, Anton V.

AU - Lear, Martin J.

AU - Song, Hong Yan

AU - Nowak, Christoph

AU - Hobley, Jonathan

PY - 2012

Y1 - 2012

N2 - A new apparatus for nanosecond-time-resolved Brewster angle reflectometry is described that can be used to measure transient angle-resolved reflectivity changes in thin films and monolayers in a single pulsed laser shot. The system was used to observe nanosecond time-resolved photodynamics in a spiropyran monolayer at the air-water interface. After UV excitation the spiropyran converted to its merocyanine form in two stages. One within a timescale close to the instrument time resolution of a few tens of nanoseconds whereas the second stage occurred over a few hundred nanoseconds.

AB - A new apparatus for nanosecond-time-resolved Brewster angle reflectometry is described that can be used to measure transient angle-resolved reflectivity changes in thin films and monolayers in a single pulsed laser shot. The system was used to observe nanosecond time-resolved photodynamics in a spiropyran monolayer at the air-water interface. After UV excitation the spiropyran converted to its merocyanine form in two stages. One within a timescale close to the instrument time resolution of a few tens of nanoseconds whereas the second stage occurred over a few hundred nanoseconds.

U2 - 10.1071/CH12093

DO - 10.1071/CH12093

M3 - Article

SN - 0004-9425

VL - 65

SP - 283

EP - 289

JO - Australian Journal of Chemistry

JF - Australian Journal of Chemistry

IS - 65

ER -

Photoconversion of Spiropyran to Merocyanine in a Monolayer Observed using Nanosecond Pump-Probe Brewster Angle Reflectometry

Abstract

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