Artículo

Simoncelli, S.; Aramendía, P.F. "Chiral power change upon photoisomerization in twisted nematic liquid crystals" (2015) Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy. 142:94-100
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Abstract:

In this work, we use the photoisomerization of azobenzenes, a phenanthrospirooxazine, and a fulgide in a twisted nematic liquid crystalline phase to change the chiral twisting power of the system. The changes are probed by the rotatory power of linearly polarized light. Time resolved and steady state experiments are carried out. The chiral change and the photoisomerization process have similar characteristic recovery times and activation energy, thus probing that the change is induced by the modification in the chemical composition of the photochromic dopant system. The amplitude of the light twisting power change correlates with the order change in the liquid crystal (LC) but not with the modification in the absorption characteristics of the system. This indicates that the driving force of the chiral change is the microscopic order modification in the LC phase that affects the helical pitch of the phase. © 2015 Published by Elsevier B.V.

Registro:

Documento: Artículo
Título:Chiral power change upon photoisomerization in twisted nematic liquid crystals
Autor:Simoncelli, S.; Aramendía, P.F.
Filiación:INQUIMAE, Departamento de Química Inorgánica, Universidad de Buenos Aires, Pabellón 2, Ciudad de Buenos Aires, 1428, Argentina
CIBION, Centro de Investigaciones en Bionanociencias Elizabeth Jares-Erijman, Godoy Cruz 2390, Ciudad de Buenos Aires, 1425, Argentina
Palabras clave:Azobenzenes; Chiral power change; Liquid crystals; Photochromism; Photoisomerization; Spirooxazine; Activation energy; Azobenzene; Chemical modification; Liquid crystals; Liquids; Photochromism; Photoisomerization; Stereochemistry; Absorption characteristics; Chemical compositions; Chiral power change; Linearly polarized light; Microscopic ordering; Spirooxazines; Twisted nematic; Twisted nematic liquid crystals; Nematic liquid crystals; azo compound; azobenzene; chemistry; isomerism; light; liquid crystal; phase transition; photochemistry; thermodynamics; Azo Compounds; Isomerism; Light; Liquid Crystals; Phase Transition; Photochemical Processes; Thermodynamics
Año:2015
Volumen:142
Página de inicio:94
Página de fin:100
DOI: http://dx.doi.org/10.1016/j.saa.2015.01.072
Título revista:Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Título revista abreviado:Spectrochim. Acta Part A Mol. Biomol. Spectrosc.
ISSN:13861425
CODEN:SAMCA
CAS:azobenzene, 103-33-3; Azo Compounds; azobenzene
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13861425_v142_n_p94_Simoncelli

Referencias:

  • Crano, J.C., Guglielmetti, R.J., (1999) Organic Photochromic and Thermochromic Compounds, , Plenum Press New York p. 378
  • Dürr, H., Bouas-Laurent, H., (2003) Photochromism: Molecules and Systems, , Elsevier Science Amsterdam p. 1218
  • Bossi, M.L., Aramendía, P.F., Photomodulation of macroscopic properties (2011) J. Photochem. Photobiol. C Photochem. Rev., 12, pp. 154-166
  • Photochromism: Molecules and switches (2000) Thematic Issue, Chem. Rev., 100, pp. 6-1890
  • Kungwatchakun, D., Irie, M., Photoresponsive polymers: Photocontrol of the phase separation temperature of aqueous solutions of poly-[N-isopropylacrylamide-co-N-(4-phenylazophenyl)acrylamide] (1988) Die Makromol. Chem. Rapid Commun., 9, pp. 243-246
  • Bandara, H.M.D., Burdette, S.C., Photoisomerization in different classes of azobenzene (2012) Chem. Soc. Rev., 41, pp. 1809-1825
  • Garcia-Amorós, J., Gómez, E., Vallés, E., Velasco, D., Photo-controllable electronic switches based on azopyridine derivatives (2012) Chem. Commun., 48, pp. 9080-9082
  • Tamaoki, N., Kamei, T., Reversible photo-regulation of the properties of liquid crystals doped with photochromic compounds (2010) J. Photochem. Photobiol. C Photochem. Rev., 11, pp. 47-61
  • White, T.J., McConney, M.E., Bunning, T.J., Dynamic color in stimuli-responsive cholesteric liquid crystals (2010) J. Mater. Chem., 20, pp. 9832-9847
  • Li, Y., Li, Q., Nanoscience with liquid crystals: From self-organized nanostructures to applications (2014) Nanoscience with Liquid Crystals: From Self-organized Nanostructures to Applications. NanoScience and Technology, pp. 135-177. , Q. Li, Springer International Publishing Switzerland
  • Yamaguchi, T., Inagawa, T., Nakazumi, H., Irie, S., Irie, M., Photoinduced pitch changes in chiral nematic liquid crystals formed by doping with chiral diarylethene (2001) J. Mater. Chem., 11, pp. 2453-2458
  • Ruslim, C., Ichimura, K., Photoswitching in chiral nematic liquid crystals: Interaction-selective helical twist inversion by a single chiral dopant (2002) J. Mater. Chem., 12, pp. 3377-3379
  • Lee, H.K., Doi, K., Harada, H., Tsutsumi, O., Kanazawa, A., Shiono, T., Ikeda, T., Photochemical modulation of color and transmittance in chiral nematic liquid crystal containing an azobenzene as a photosensitive chromophore (2000) J. Phys. Chem. B, 104, pp. 7023-7028
  • Li, Y., Li, Q., Photochemically reversible and thermally stable axially chiral diarylethene switches (2012) Org. Lett., 14, pp. 4362-4365
  • Hrozhyk, U.A., Serak, S.V., Tabiryan, N.V., White, T.J., Bunning, T.J., Optically switchable, rapidly relaxing cholesteric liquid crystal reflectors (2010) Opt. Express, 18, pp. 9651-9657
  • Van Delden, R.A., Mecca, T., Rosini, C., Feringa, B.L., A chiroptical molecular switch with distinct chiral and photochromic entities and its application in optical switching of a cholesteric liquid crystal (2004) Chem. A Eur. J., 10, pp. 61-70
  • Bossi, M.L., Murgida, D.H., Aramendía, P.F., Photoisomerization of azobenzenes and spirocompounds in nematic and in twisted nematic liquid crystals (2006) J. Phys. Chem. B, 110, pp. 13804-13811
  • Bossi, M.L., Rodríguez, J.B., Aramendía, P.F., Photoinduced changes of absorption and circular dichroism in a chiral nematic phase containing a photochromic fulgide (2006) J. Photochem. Photobiol. A Chem., 179, pp. 35-41
  • Nishimura, N., Sueyoshi, T., Yamanaka, H., Imai, E., Yamamoto, S., Hasegawa, S., Thermal cis-to-trans isomerization of substituted azobenzenes II. Substituent and solvent effects (1976) Bull. Chem. Soc. Jpn., 49, pp. 1381-1387
  • Asano, T., Okada, T., Shinkai, S., Shigematsu, K., Kusano, Y., Manabe, O., Temperature and pressure dependences of thermal cis-to-trans isomerization of azobenzenes which evidence an inversion mechanism (1981) J. Am. Chem. Soc., 103, pp. 5161-5165
  • Favaro, G., Masetti, F., Mazzucato, U., Ottavi, G., Allegrini, P., Malatesta, V., Photochromism, thermochromism and solvatochromism of some spiro [indolinoxazine]-photomerocyanine systems: Effects of structure and solvent (1994) J. Chem. Soc. Faraday Trans., 90, pp. 333-338
  • Hartley, G.S., The cis-form of azobenzene and the velocity of the thermal cis-trans-conversion of azobenzene and some derivatives (1938) J. Chem. Soc., 113, pp. 633-642

Citas:

---------- APA ----------
Simoncelli, S. & Aramendía, P.F. (2015) . Chiral power change upon photoisomerization in twisted nematic liquid crystals. Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 142, 94-100.
http://dx.doi.org/10.1016/j.saa.2015.01.072
---------- CHICAGO ----------
Simoncelli, S., Aramendía, P.F. "Chiral power change upon photoisomerization in twisted nematic liquid crystals" . Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy 142 (2015) : 94-100.
http://dx.doi.org/10.1016/j.saa.2015.01.072
---------- MLA ----------
Simoncelli, S., Aramendía, P.F. "Chiral power change upon photoisomerization in twisted nematic liquid crystals" . Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, vol. 142, 2015, pp. 94-100.
http://dx.doi.org/10.1016/j.saa.2015.01.072
---------- VANCOUVER ----------
Simoncelli, S., Aramendía, P.F. Chiral power change upon photoisomerization in twisted nematic liquid crystals. Spectrochim. Acta Part A Mol. Biomol. Spectrosc. 2015;142:94-100.
http://dx.doi.org/10.1016/j.saa.2015.01.072