Influence of molecular composition on H-aggregation in hemicyanine Langmuir-Blodgett multilayers

Abstract

Influence of molecular composition in hemicyanine Langmuir-Blodgett (LB) films, on the aggregation features was investigated by using steady state and time-resolved photoluminescence spectroscopy. It was found that a lower degree of H-aggregation (smaller aggregate size) could be realized in hemicyanine LB films with larger donor groups, leading to a smaller photoluminescence peak blue shift with respect to their solution spectra and longer aggregate lifetime.

References

[1] RobertsG.. Langmuir-Blodgett films, 1990, 1st editionNew York, Plenum Press

[2] PrassadP. N., WilliamsD. J.. Introduction to Nonlinear Optical Effects in Molecules & Polymers, 1991, 1st editionNew York, Wiley-Interscience

[3] LupoD., PrassW., ScheunemannU.. J. Opt. Soc. Am. B, 1988, 5: 300-300

[4] MaS. H., LuX. Z., ZhengJ. B.. Thin Solid Films, 1995, 254: 263-263

[5] SchildkrautJ. S., PennerT. L., WillandC. S.. Opt. Lett., 1988, 13: 134-134

[6] AshwellG. J., DawnayE. J., KuczynskiA. P.. SPIE Int. Soc. Opt. Eng., 1991, 1361: 589-589

[7] GirlingI. R., CadeN. A., KolinskyP. V.. Thin Solid Films, 1985, 132: 101-101

[8] MaS. H., LuX. Z., SongJ.. Langmuir, 1995, 11: 2751-2751

[9] WagnereG. H., HutterJ. B.. J. Opt. Soc. Am. B, 1989, 6: 693-693

[10] KemnitzK., TamaiN., YamazakiI.. J. Phys. Chem., 1986, 90: 5094-5094

[11] KellerD., BwstamanteG.. J. Phys. Chem., 1986, 84: 5094-5094

[12] GradJ., HernandezG., MukamelS.. Phys. Rev. A, 1988, 37: 3835-3835

[13] MukamelS., SpanoF. C.. J. Phys. Chem., 1989, 91: 683-683

[14] VitukhnovskyA. G., SluchM. I., WarrenJ. G.. Chem. Phys. Lett., 1990, 173: 425-425

[15] AndreoniA., CubedduR., SilvestriS.. Chem. Phys. Lett., 1982, 88: 33-33