A. Credi, V. Balzani, S. J. Langford and J. F. Stoddart, J. Am. Chem.
Soc., 1997, 119, 2679; (h) P. Ghosh, P. K. Bharadwaj, S. Mandal and
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Financial support from DST, New Delhi, India (to P. K. B.) is
gratefully acknowledged. B. P. B. wishes to thank CSIR for a
senior research fellowship.
6 For more examples of molecular AND logic gate based on fluorescence
modulation, see: (a) A. P. de Silva, G. D. McClean and S. Pagliari,
Chem. Commun., 2003, 2010; (b) H.-F. Ji, R. Dabestani and
G. M. Brown, J. Am. Chem. Soc., 2000, 122, 9306; (c) A. P. de Silva,
H. Q. N. Gunaratne and C. P. McCoy, J. Am. Chem. Soc., 1997, 119,
7891; (d) S. Iwata and K. Tanaka, J. Chem. Soc., Chem. Commun.,
1995, 1491; (e) A. P. de Silva, H. Q. N. Gunaratne and C. P. McCoy,
Nature, 1993, 364, 42.
Bamaprasad Bag and Parimal K. Bharadwaj*
Department of Chemistry, Indian Institute of Technology Kanpur,
208016, India. E-mail: pkb@iitk.ac.in
Notes and references
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11 The PET process is considerably enhanced in polar medium due to
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1 Fundamentals of Photoinduced Electron Transfer, ed. G. J. Kavarnos,
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13 Complex binding constants are determined from the increase in
fluorescence intensity (at 430 nm) as well as quantum yields as a
function of added ionic input concentrations according to the reported
procedures: (a) ref. 6a; (b) S. Fery-Forgues, M.-T. Le Bris, J.-P. Guette´
and B. Valeur, J. Phys. Chem., 1988, 92, 22, 6233. The values thus
obtained are comparable with those available in the literature within
experimental errors.
This journal is ß The Royal Society of Chemistry 2005
Chem. Commun., 2005, 513–515 | 515