Browsing by Author "Thomas, John M."
Now showing items 1-7 of 7
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Crystal engineering of photodimerizable cyclopentanones. Comparison of chloro and methyl substitution as solid-state steering groups
Jones, W.; Ramdas, Subramaniam; Theocharis, Charis R.; Thomas, John M.; Thomas, N. W. (1981)The interchangability of chloro and methyl groups, insofar as solid-state structure and photoreactivity are concerned, is examined in a family of three pairs of closely related molecules derived from the same parent, ...
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Article
Engineering organic crystals so as to control the photoreactivity of the reactants and the crystallinity of the products
Jones, W.; Nakanishi, H.; Theocharis, Charis R.; Thomas, John M. (1980)A family of organic molecular crystals based on benzylidenecyclopentanone provides a basis for an assessment of topotactic and topochemical photoreactivity.
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Article
Phonon spectroscopy of photochemical reactions in organic solids: Photodimerization of 2-benzyl-5-benzylidenecyclopentanone and photopolymerization of 2,5-distyrylpyrazine
Swiatklewicz, J.; Eisenhardt, G.; Prasad, P. N.; Thomas, John M.; Jones, W.; Theocharis, Charis R. (1982)The nature of the photoreactions in 2-benzyl-5-benzylidenecyclopentanone (abbreviated as BBCP) and 2,5-distyrylpyrazine (abbreviated as DSP) is investigated by a combination of Raman spectroscopy and electronic spectroscopy. ...
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Article
PHOTODIMERISATION OF CRYSTALLINE 2,5-DIBENZYLIDENECYCLOPENTANONE.
Theocharis, Charis R.; Thomas, John M.; Jones, William (1982)The solid state photocycloaddition of 2,5-dibenzylidenecyclopentanone and the photostability of 2,5-dibenzylidene-methylcyclopentanone were used to show that topochemical reaction may proceed in crystals in which the ...
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Article
The solid-state photodimerisation of 2,5-dibenzylidenecyclopentanone (DBCP): A topochemical reaction that yields an amorphous product
Theocharis, Charis R.; Jones, W.; Thomas, John M.; Motevalli, M.; Hursthouse, M. B. (1984)When 2,5-dibenzylidenecyclopentanone (DBCP) is irradiated by u.v. light in the crystalline state the principal product formed by a [2 + 2] dimerisation is 2,9-dibenzylidene-6,12-diphenyldispiro[4.1.4.1]-dodecane-1,8-dione (DDBCP)
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Article
Structural mimicry and the photoreactivity of organic solids
Jones, W.; Theocharis, Charis R.; Thomas, John M.; Desiraju, G. R. (1983)Molecules that are photostable in the solid state can be rendered photoactive if, by burial within crystals of closely analogous monomers, they can be made to mimic the molecular conformation of the latter
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Structure of a 'doped' diacetylene that is polymerisable in the solid state
Theocharis, Charis R.; Nakanishi, H.; Matsuda, H.; Jones, W.; Thomas, John M.; Kato, M. (1985)The crystal structure has been determined of a silver perchlorate-doped diacetylene derivative which yields upon γ-ray irradiation a semi-conducting polymer product