Direct Spectroscopic Evidence of Photoisomerization in para-Methoxy Methylcinnamate Revealed by Low-Temperature Matrix-Isolation FTIR Spectroscopy | Zendy

Yasunori Miyazaki | Zendy; Yoshiya Inokuchi | Zendy; Nobuyuki Akai | Zendy; Takayuki Ebata | Zendy

Open Access

Direct Spectroscopic Evidence of Photoisomerization in para-Methoxy Methylcinnamate Revealed by Low-Temperature Matrix-Isolation FTIR Spectroscopy

Author(s) -

Yasunori Miyazaki,

Yoshiya Inokuchi,

Nobuyuki Akai,

Takayuki Ebata

Publication year - 2015

Publication title -

the journal of physical chemistry letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.563

H-Index - 203

ISSN - 1948-7185

DOI - 10.1021/acs.jpclett.5b00203

Subject(s) - photoisomerization , matrix isolation , isomerization , fourier transform infrared spectroscopy , photochemistry , spectroscopy , excited state , irradiation , chemistry , infrared spectroscopy , infrared , ultraviolet , ultraviolet visible spectroscopy , materials science , analytical chemistry (journal) , optics , optoelectronics , organic chemistry , physics , atomic physics , quantum mechanics , nuclear physics , catalysis

The photoisomerization of para-methoxy methylcinnamate (p-MMC) has been studied by low-temperature matrix-isolation FTIR spectroscopy. In particular, the difference spectrum of the mid-IR frequency region (1100-1800 cm(-1)) allows us to distinguish the structural change before and after ultraviolet (UV) light irradiation at ≥300 nm and to convince that the cis-isomer is produced from the trans-isomer by comparing with the calculated IR spectra. Additionally, a reversible isomerization of p-MMC is demonstrated upon a sequential irradiation with different wavelengths of UV light. These findings provide a new insight into the electronic excited-state dynamics of p-MMC.

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