alpha-Helix formation in melittin and beta-lactoglobulin A induced by fluorinated dialcohols

Article Abstract:

Helix induction in melitting and beta-lactoglobulin A is enhanced by fluorinated diols with the order to efficiency 2,2,3,3-tetrafluoro-1,4-butanediol (TFBD) < 2,2,3,3,4,4-hexafluoro-1,6-pentanediol (HFPD) < 2,2,3,3,4,4,5,5,-octafluoro-1,6-hexanediol (OFHD). The negligible red-edge excitation shift in the fluorescence of melittin has shown that the fluorinated diol/water solvent shell surrounding the tryptophan chromophore is less immobilized than is molecules in a lamellar vesicle.

Analysis, Alcohols, Circular dichroism, Globulin, Globulins

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Triplet-state and singlet oxygen formation in fluorene-based alternating copolymers

Article Abstract:

A study was conducted about triplet-state formation and intersystem crossing in an A-alt-B series of fluorene copolymers using flash photolysis and pulse radiolysis-energy transfer. Fluorene-thiophene copolymers PFaT and PF3T, the triplet energies are closer to those of thiophene oligomers, indicating that there is significant conjugation between fluorene and thiophene units but also that there is a more localized triplet state than with the homopolymers.

Copolymers, Photolysis

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Photoinduced chemical vapor deposition of amorphous carbon films from chloromethane using a VUV laser (157 nm)

Article Abstract:

Amorphous carbon (a-C) films with low hydrogen content were deposited at low substrate temperatures from a chlorinated hydrocarbon (CH3CL) by photoinduced chemical vapor deposition with a fluorine laser (157 nm). The optical gap, as determined by photothermal deflection spectroscopy (PDS), decreased from 2.3 to 0.1 eV when the substrate temperature was increased from 303 to 643 K.

Carbon paper and inked ribbons, Carbon Film Sheets, Carbon Paper and Inked Ribbon Manufacturing, Chemical vapor deposition, Chemical vapour deposition, Carbon films

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