Abstract
The effect of unsubstituted polycyclic aromatic hydrocarbons composed of 3, 4, and 5 benzenold rings on the growth effect of E. coli has been investigated. A criterion for growth enhancement is an angular acene molecular geometry. However, the linear acenes, tetracene and pentacene, as well as the angular chrysene and 1, 2, 3, 4-dibenzanthracene, inhibit growth. A review of crystal structure studies of spiro carbon hydrocarbons and spiro-ketohydrocarbons is given and a description of a novel way of solving the crystallographic phase problem, visual packing analysis, is described. The method was used to solve the crystal structure of spiro (5.5) undeca-1, 4, 7, 10-tetraene-3, 9- dione, and structural parameters of this compound are detailed. The results of ground state molecular orbital calculations of a family of dienone compounds and a family of bridged biphenyl compounds are reported. The transfer of energy in the second excited state of bis (2,2'- biphenylene) methane, or spirobifluorene, is investigated using fluorescence depolarization as a probe. Fluorescence depolarization does occur in S2, but it was not possible to determine if the mechanism is one of interchromophoric transfer or vibronic dipole coupling.
Hass, Bruce Stuart (1974). Growth functions, structural properties and energy transfer in model hydrocarbon compounds. Doctoral dissertation, Texas A&M University. Texas A&M University. Libraries. Available electronically from
https : / /hdl .handle .net /1969 .1 /DISSERTATIONS -175751.