@article{lucia_wyrozebski_chen_geiger_whitten_1998, title={Electron transfer photofragmentation reactions in monolayer films at the air/water interface}, volume={14}, ISSN={["0743-7463"]}, DOI={10.1021/la9713558}, abstractNote={A series of photoinduced electron-transfer fragmentation reactions have been studied in compressed monolayer films at the air/water interface. The reactions investigated involve amphiphilic and polymeric derivatives of fragmentable amino alcohol, 1,2-diamine, and pinacol donors and light-absorbing acceptors, which are reactive in solution-phase studies from their triplet states. For intralayer studies a surfactant anthraquinone derivative was the light-absorbing acceptor. For comparable interfacial studies, the water soluble cation tris(2,2'-bipyridine)ruthenium(II)2+ (Ru(bpy) 32+) was the photoactive acceptor from the subphase. The fragmentation reactions all involve oxidative cleavage of a relatively strong C-C bond in the donor. Reaction was followed in each case by monitoring changes in surface pressure that occur when the compressed film is irradiated and maintained at a constant area. Reaction was readily observed in most cases where the donor and light-absorbing substrate are present; however the consequences were found to be quite dependent upon the specific donor substrate. Thus for simple single-chain amphiphiles containing either amino alcohol or 1,2-diamine donor sites, both intralayer and interfacial reactions result in rapid decrease in surface pressure, consistent with destruction of the film as the more hydrophilic redox products are solubilized into the subphase. For a polymeric diamine, much more complex behavior is observed, consistent with a situation where single fragmentation events do not lead to removal of material from the film but multiple fragmentation reactions culminate in film solubilization. Finally, a double-chain amphiphilic pinacol was found to undergo interfacial fragmentation with Ru(bpy) 32+ in the subphase with a concurrent increase in surface pressure to form stable films that do not dissolve' into the subphase. The isotherms observed following irradiation, decompression, and recompression are consistent with an expansion that occurs as the two-chain amphiphile undergoes redox fragmentation to produce two equivalents of a single-chain amphiphile.}, number={13}, journal={LANGMUIR}, author={Lucia, LA and Wyrozebski, K and Chen, LH and Geiger, C and Whitten, DG}, year={1998}, month={Jun}, pages={3663–3672} }
 @article{chen_lucia_gaillard_whitten_icil_icli_1998, title={Photooxidation of a conjugated diene by an exciplex mechanism: Amplification via radical chain reactions in the perylene diimide-photosensitized oxidation of alpha-terpinene}, volume={102}, ISSN={["1089-5639"]}, DOI={10.1021/jp983346t}, abstractNote={Irradiation of the perylene diimide (1) or 9,10-dicyanoanthracene (DCA) in the presence of α-terpinene (2-HH) in the presence of molecular oxygen leads to moderately efficient oxidation of 2-HH to p-cymene (2). Although 1 might be expected to photosensitize oxidations by the conventional “singlet oxygen” pathways, spectroscopic studies indicate that while oxygen can quench the fluorescent singlet of 1, no singlet oxygen is produced. 2-HH is also an efficient quencher of the fluorescent singlets of 1 and DCA and, for nonpolar solvents such as methylene chloride, in each case the quenching results in formation of an exciplex or contact radical ion pair. Under conditions where quenching by 2-HH to form the exciplex is complete, maximum quantum yields of 2 are obtained, thus indicating that the exciplex is the precursor to its formation. Nonproductive decay of the exciplex to starting materials is its major fate, thus the moderately high quantum efficiencies for formation of 2 require a mechanism involving am...}, number={45}, journal={JOURNAL OF PHYSICAL CHEMISTRY A}, author={Chen, LH and Lucia, LA and Gaillard, ER and Whitten, DG and Icil, H and Icli, S}, year={1998}, month={Nov}, pages={9095–9098} }
 @article{chen_sowell_humphries_1976, title={SIMULATION-MODEL FOR MULTIPLE HARVESTING OF PICKLING CUCUMBERS}, volume={21}, ISSN={["0021-8634"]}, DOI={10.1016/0021-8634(76)90099-8}, abstractNote={Abstract A simulation model for multiple-pick harvesting of pickling cucumbers has been developed. This model can be used as a tool to help pickling cucumber growers optimize their farm operation in terms of land area, harvest interval and harvesting machinery selection. This model also permits the grower to evaluate the sensitivity of the interactions of various parameters affecting the system including the day-to-day weather uncertainty.}, number={1}, journal={JOURNAL OF AGRICULTURAL ENGINEERING RESEARCH}, author={CHEN, LH and SOWELL, RS and HUMPHRIES, EG}, year={1976}, pages={67–75} }