Bouas-Laurent studies

Marquis D, Desvergne JP, Bouas-Laurent H (1995) Photoresponsive supramolecular systems synthesis and photophysical and photochemical study of bis-(9,10-anthracenediyl) coronands AAOnOn. J Org Chem 60 7984-7996... 

E. Pajot-Augy, L. Bokobza, L. Monnerie, A. Castallan, and H. Bouas-Laurent, Mobility of macro-molecular chains as studied by means of excimer fluoresence, Macromolecules 17, 1490 (1984). 

Intramolecular photocycloaddition of naphthalene and anthracene has been studied by Chandross and Schiebel [327], At concentrations above 10 3 M, bi-molecular photodimerization of the anthracene occurs in deaerated methylcyclo-hexane solution. In contrast, irradiation of much more dilute ( 2 X 105 M) solutions resulted in the formation of intramolecular adduct 342 (Scheme 94). Bouas-Laurent et al. showed that the CH2—O—CH2 link is more efficient than the (CH2)3 chain in bridging the two chromophores [328], Irradiation of diethyl ether or methylcyclohexane solution of 343 (5 X 10 5 M) with a high-pressure mercury lamp and liquid filter (X > 335 nm) gave a single photoadduct 344, which was isolated quantitatively. The quantum yield of 344 is 10 times higher than that of 342. 

Bouas-Laurent and colleagues studied the photocyclomerization of bis-9-anthrylmethyl ether 351a and its derivatives 351b-f [348] (Scheme 97) and concluded that the three-membered ether linkage enable more relevant conformations for efficient photocyclomerization than the trimethylene chain (see Table 9). 

Castellan, A., Colombo, N., Fomier de Violet, Nourmamode, A., and bouas-Laurent, H., "Photodegradation of Lignin A Photochemical Study of Bleached CTMP and Lignin Model Molecules", Proceedings of the 5th International Symposium of Woos and Pulping Chemistry, Raleigh, N.C., 1989, p.421-. 

Whittal J (1990) In Durr H, Bouas-Laurent H (eds) Photochromism, molecules and systems. Studies in organic chemistry, vol 40. Elsevier, Amsterdam, chap 9, p 467... 

H. Bouas-Laurent (eds). Studies in Organic Chemistry, Volume 40, Elsevier, Amsterdam, 1990. 

C Vanned, P Pomier de Violet, H Bouas-Laurent, and A Castellan. Photodegradation of Lignin A Photophysical and Photochemical Study of a Nonphenolic a-carbonyl (3-0-4 Lignin Model Dimer, 3,4-dimethoxy-a-(2 -methoxyphenoxy)acetophenone. J. Photochem. Photobiol., A. Chem. 41 251-265, 1988. 

A Castellan, N Colombo, C Vanucci, P Fornier de Violet, and H Bouas-Laurent. A Photochemical Study of an O-methylated a-carbonyl (3-1 Lignin Model Dimer 1,2-di-(3, 4 -dimethoxyphenyl)ethanone (deoxyveratroin). J. Photochem. Photobiol, A Chemistry 51 451-461, 1990. 

Photochromism - Much interesting work continues on this topic with an aim of improving materials for various technological applications. A very comprehensive (and expensive) text has been edited by Durr and Bouas-Laurent and must be an indispensable source of information to anyone with a serious interest in this field. A few papers which have strong photophysical aspects will be mentioned. These include a spectroscopic study of N- 2-hydroxybenzylidene) aniline and its photoproducts,photophysics... 

L. Zechmeister, Cis-Trans Isomeric Carotenoids, Vitamins A and Arylpolyenes, Vienna, Springer, 1962 S. E. Braslavsky, in Photochromism, Molecules and Systems, Studies in Organic Chemistry, Vol. 40, H. Diirr and H. Bouas-Laurent, Eds., Elsevier, Amsterdam, 1990, p. 738 M. Ottolenghi, Adv. Photochem. 12,97 (1980). 

Figure 2.1 shows the photochromic mechanism of spironaphtoxazine dye at the molecular level. Spironaphtoxazines have been widely studied and researched in the literature (Bamfield, 2001), and they are an interesting class of photochromic dyes for their appUcation potentials to textile fibres (Durasevic et al., 2011 Bouas-Laurent and Durr, 2001). The mechanism according to which the photochromism... 

Fages. F. Desvergne, J.-P. Bouas-Laurent. H. Lehn, J.-M. Barrans. Y. Marsau, P. Meyer. M. Albrecht-Gary, A.-M. Synthesis, stmctural. spectroscopic, and alkali-metal cations complexation studies of a bis-anthracenediyl macrotricyclic ditopic receptor. J. Org. Chem. 1994. 59. 5264-5271. 

Bertelson, R.C., Photochromic processes involving heterolytic cleavage, in Techniques in Chemistry, Vol. 3, Photochromism, Brown, G.H., Ed., Wiley-Interscience, New York, 1971, p. 45. Guglielmetti, R., 4n-i-2 Systems spiropyrans in Studies in Organic Chemistry, Vol. 40, Photochromism — Molecules and Systems, Dilrr, H. and Bouas-Laurent, H., Eds., Elsevier, Amsterdam,... 

---