Croatica Chemica Acta, Vol. 84 No. 2, 2011.
Izvorni znanstveni članak
https://doi.org/10.5562/cca1826
Localization of the Counterion of the Protonated Schiff Base of n-butylretinal in Solution
Nikola Biliškov
; Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia
Jurica Novak
; Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia
Milena Petković
; Faculty of Physical Chemistry, University of Belgrade, Studentski trg, 12–16, 11000 Belgrade, Serbia
Goran Zgrablić
; Sincrotrone Trieste, S.S. 14 km 163.5 in Area Science Park, 34012 Basovizza Trieste, Italy
Goran Baranović
; Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia
Nađa Došlić
; Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia
Sažetak
The vibrational spectra of the protonated Schiff base of n-butylretinal (nSBR+) in dichloromethane
are studied. The trifluoroacetic acid (TFA) is used for the protonation of the Schiff base of nbutylretinal
(nSBR). Combining the two-dimensional correlation analysis of the experimental infrared
spectra with anharmonic frequency calculations it is shown that two types of ionic aggregates between
nSBR+ and the TFA counterion are formed.
The study suggests that the interaction between nSBR+ and the TFA counterion may be responsible for the
observed lost of photoselectivity in the trans-cis isomerization of the nSBR+ in solution. (doi: 10.5562/cca1826)
Ključne riječi
n-butylretinal; trifluoroacetic acid; infrared spectroscopy; hydrogen bonding; DFT; anharmonic frequency
Hrčak ID:
71985
URI
Datum izdavanja:
3.10.2011.
Posjeta: 2.736 *