PMID- 26280514
OWN - NLM
STAT- MEDLINE
DCOM- 20160523
LR  - 20150828
IS  - 1463-9084 (Electronic)
IS  - 1463-9076 (Linking)
VI  - 17
IP  - 35
DP  - 2015 Sep 21
TI  - Retinal shows its true colours: photoisomerization action spectra of 
      mobility-selected isomers of the retinal protonated Schiff base.
PG  - 22623-31
LID - 10.1039/c5cp03611a [doi]
AB  - Retinal is one of Nature's most important and widespread chromophores, exhibiting 
      remarkable versatility in its function and spectral response, depending on its 
      protein environment. Reliable spectroscopic and photochemical data for the 
      isolated retinal molecule are essential for calibrating theoretical approaches 
      that seek to model retinal's behaviour in complex protein environments. However, 
      due to low densities and possible co-existence of multiple isomers, retinal is a 
      challenging target for gas-phase investigations. Here, the photoisomerization 
      behaviour of the trans isomer of the retinal protonated Schiff base (RPSB) is 
      investigated in the gas phase by irradiating mobility-selected RPSB ions with 
      tunable light in a tandem ion mobility spectrometer. trans RPSB ions are 
      converted to single cis isomers and also more compact isomers through irradiation 
      with visible light. The S1<-- S0 photoisomerization action spectrum of trans RPSB, 
      obtained by monitoring production of cis isomers as a function of wavelength, 
      exhibits a single well-defined peak with a maximum at 618 +/- 5 nm. Corresponding 
      action spectra of cis RPSB isomers exhibit broader peaks, conclusively 
      demonstrating an isomeric dependence for the RPSB spectrum in the gas phase.
FAU - Coughlan, N J A
AU  - Coughlan NJ
AD  - School of Chemistry, The University of Melbourne, Melbourne, Australia. 
      evanjb@unimelb.edu.au.
FAU - Adamson, B D
AU  - Adamson BD
FAU - Gamon, L
AU  - Gamon L
FAU - Catani, K
AU  - Catani K
FAU - Bieske, E J
AU  - Bieske EJ
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20150817
PL  - England
TA  - Phys Chem Chem Phys
JT  - Physical chemistry chemical physics : PCCP
JID - 100888160
RN  - 0 (Protons)
RN  - 0 (Schiff Bases)
RN  - RR725D715M (Retinaldehyde)
SB  - IM
MH  - Isomerism
MH  - Molecular Structure
MH  - *Protons
MH  - Retinaldehyde/*chemistry/*radiation effects
MH  - Schiff Bases/*chemistry/radiation effects
MH  - Spectrometry, Mass, Electrospray Ionization
EDAT- 2015/08/19 06:00
MHDA- 2016/05/24 06:00
CRDT- 2015/08/18 06:00
PHST- 2015/08/18 06:00 [entrez]
PHST- 2015/08/19 06:00 [pubmed]
PHST- 2016/05/24 06:00 [medline]
AID - 10.1039/c5cp03611a [doi]
PST - ppublish
SO  - Phys Chem Chem Phys. 2015 Sep 21;17(35):22623-31. doi: 10.1039/c5cp03611a. Epub 
      2015 Aug 17.