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For an early example of cooperative cation binding, see: (a) Kopolow, S.; Hogen Esch, T. E.; Smid, J. Macromolecules 1973, 6, 133-142. An example involving energy migration and hence signal amplification in grafted, nonconjugated systems has very recently been reported in: (b) Broadwater, S. J.; Hickey, M. K.; McQuade, D. T. J. Am. Chem. Soc. 2003, 125, 11154-11155.
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For an early example of cooperative cation binding, see: (a) Kopolow, S.; Hogen Esch, T. E.; Smid, J. Macromolecules 1973, 6, 133-142. An example involving energy migration and hence signal amplification in grafted, nonconjugated systems has very recently been reported in: (b) Broadwater, S. J.; Hickey, M. K.; McQuade, D. T. J. Am. Chem. Soc. 2003, 125, 11154-11155.
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For reviews, consult: (a) Das, S.; Thomas, K. G.; George, M. V. Mol. Supramol. Photochem. 1997, 1, 467-517. (b) Law, K.-Y. Mol. Supramol. Photochem. 1997, 1, 519-584. (c) Law, K.-Y. Chem. Rev. 1993, 93, 449-486.
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For reviews, consult: (a) Das, S.; Thomas, K. G.; George, M. V. Mol. Supramol. Photochem. 1997, 1, 467-517. (b) Law, K.-Y. Mol. Supramol. Photochem. 1997, 1, 519-584. (c) Law, K.-Y. Chem. Rev. 1993, 93, 449-486.
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3142614703
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"Exciton interaction" is a common term used in squaraine literature for describing the effect of electronic interactions between squaraine pairs, although it is strictly speaking a "pseudo-excimeric" interaction.
-
-
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18
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0031057530
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For an example, see: Liang, K; Farahat, M. S.; Perlstein, J.; Law, K.-Y.; Whitten, D. G. J. Am. Chem. Soc. 1997, 119, 830-831.
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22
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0036260210
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During the course of our investigations, a calcium sensor based on a bis(squaraine) molecule containing no ortho-hydroxyl groups that exhibits enhanced dimer aggregation upon binding has been reported: (d) Ajayaghosh, A.; Arunkumar, E.; Daub, J. Angew. Chem., Int. Ed. 2002, 41, 1766-1769. (e) Chenthamarakshan, C. R.; Ajayaghosh, A. Tetrahedron Lett. 1998, 39, 1795-1798.
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23
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0032568286
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During the course of our investigations, a calcium sensor based on a bis(squaraine) molecule containing no ortho-hydroxyl groups that exhibits enhanced dimer aggregation upon binding has been reported: (d) Ajayaghosh, A.; Arunkumar, E.; Daub, J. Angew. Chem., Int. Ed. 2002, 41, 1766-1769. (e) Chenthamarakshan, C. R.; Ajayaghosh, A. Tetrahedron Lett. 1998, 39, 1795-1798.
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For a comprehensive discussion of the squaraine condensation mechanism, consult: Law, K.-Y.; Bailey, F. C. Can. J. Chem. 1986, 64, 2267-2273.
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Dirk, C. W.; Herndon, W. C.; Cervantes-Lee, F.; Selnau, H.; Martinez, S.; Kalamegham, P.; Tan, A.; Campos, G.; Velez, M.; Zyss, J.; Ledoux, I.; Cheng, L.-T. J. Am. Chem, Soc. 1995, 117, 2214-2225.
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Tertiary amines are necessary to prevent squaramide formation. For the only exception, see: Bello, K. A.; Corns, S. N.; Griffiths, J. J. Chem. Soc., Chem. Commun. 1993, 452-454.
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See for example: (a) Havinga, E. E.; Pomp, A.; Ten Hoeve, W.; Wynberg, H. Synth. Met. 1995, 69, 581-582. For a review, see: (b) Ajayaghosh, A. Chem. Soc. Rev. 2003, 32, 181-191 and references therein.
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See for example: (a) Havinga, E. E.; Pomp, A.; Ten Hoeve, W.; Wynberg, H. Synth. Met. 1995, 69, 581-582. For a review, see: (b) Ajayaghosh, A. Chem. Soc. Rev. 2003, 32, 181-191 and references therein.
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See, for example: (a) Liang, K.; Law, K.-Y.; Whitten, D. G. J. Phys. Chem. 1994, 98, 13379-13384. (b) Chen, H.; Farahat, M. S.; Law, K.-Y.; Whitten, D. G. J. Am. Chem. Soc. 1996, 118, 2584-2594.
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See, for example: (a) Liang, K.; Law, K.-Y.; Whitten, D. G. J. Phys. Chem. 1994, 98, 13379-13384. (b) Chen, H.; Farahat, M. S.; Law, K.-Y.; Whitten, D. G. J. Am. Chem. Soc. 1996, 118, 2584-2594.
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3142545331
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note
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eq, which cannot be determined independently from each other because the pure H-dimer state is not accessible.
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35
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0041573625
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Ouchi, M.; Inoue, Y.; Kanzaki, T.; Hakushi, T. J. Org. Chem. 1984, 49, 1408-1412.
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Vögtle, F.; Weber, E. Angew. Chem., Int. Ed. Engl. 1979, 18, 753-777.
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3142614702
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note
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D for model monomer 4 might be associated with a larger error.
-
-
-
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41
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0001328982
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In general, singly charged alkaline metal cations display smaller binding constants to oligoethylene glycol chains as compared with the doubly charged earth alkaline metal cations. See for example: Izatt, R. M.; Eatough, D. J.; Christensen, J. J. Struct. Bonding (Berlin) 1973, 16, 161-89.
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Izatt, R.M.1
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42
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3142651009
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note
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Actually, close to twice as many cations are needed to disrupt all possible chromophore dimerizations in a polymer; i.e., at a certain cation and the same overall chromophore concentrations, the dimeric compound is exposed to a stimulus twice as strong as the polymers.
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