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A collection of academic publications by faculty and staff, both before and during their time at UPEI.

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The traditional techniques of transmission and attenuated total reflectance (ATR) spectroscopy for determining the optical constants of liquids are not practical or reliable for very strong absorption bands. Specular reflectance can be used in these cases, but for volatile liquids it is impossib...
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The outer-sphere oxidation of the nickel(II) complex of the deprotonated pendant-arm macrocycle, 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane-1-acetate, [NiL1(OH2)](+) by bis-(1,4,7-triazacyclononane)nickel(III), [Ni(tacn)(2)](3+) has been studied in aqueous perchlorate media. The rea...
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Compound 2, which was designed to act as a fluorescent sensor for calcium according to the PET (Photoinduced Electron Transfer) principle, shows a relatively small Ca2+-induced fluorescence enhancement factor (FE) of 1.8 whereas its close relative 1 is known to display a far higher FE value of 16. T...
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A novel degradative route to pregnanes has been elucidated in the marine sponge Araphimedon compressa. 22-Dehydrosterols, common in the diet of sponges, are the precursors to pregnanes and apparently are degraded by a mechanism analogous to the dealkylation of phytosterols to cholesterol.
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MoSe2 has been encapsulated with a variety of guest species. This was achieved by first treating the MoSe2 with an excess of n-BuLi to form the lithiated phase of MoSe2 (LixMoSe2). The LixMoSe2 exfoliates readily in water or NMF to yield single layers of MoSe2. Addition of solutions of polymers, org...
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Three nickel(II) pentaazamacrocycles bearing pendant alkyl tails have been synthesized, and the crystal structure of one (bearing an octyl tail) is reported. The redox potentials of the complexes, for oxidation of the nickel(II) centre, is 0.72 V (versus S. H. E.) in all cases, indicating that the p...
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C-60 acts as a mechanistic probe for the formation of carbene, diazo compound, and for the rearranged product via the excited state in the photolysis of 3-chloro-3-isopropyldiazirine and 3-chloro-3-chloromethyldiazirine. The carbene adds to C-60 to form methanofullerene, whereas the diazo compound a...
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The photolysis of m-phenylene-bis(chlorodiazirine) in the presence of 2-vinylpyridine (VP) yields the m-phenylene-bis(indolizine) by a mechanism involving two consecutive photoreactions. Photolysis of a first diazirine ring generates a carbene which reacts with 2-VP to give, via a sequence of fast t...
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Gorgonian corals have proven to be a prolific source of a variety of biologically active terpenes. Corals of the genus Plexaurella are known to be the source of a diverse array of sesquiterpenes, and past reports have indicated variability in terpene content. This study involved an examination of th...
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2,2'-Pyridyl- and 2,2'-thienylpyrroles containing substituents at the 1- and 3-positions of the pyrrole ring have been prepared from the reaction of heteroarylchlorocarbenes with 1-azabuta-1,3-dienes. Laser flash photolysis of heteroarylchlorocarbene in isooctane in the presence of 1-azabu...
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The ecteinascidins are a family of tetrahydroisoquinoline alkaloids isolated from the tunicate Ecteinascidia turbinata. Ecteinascidin 743 is a candidate for the treatment of several human cancers. Ecteinascidins have been shown to kill tumor cells in vitro, inhibit tumor growth in vivo, suppress all...
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Host-guest interactions between alpha- and beta-cyclodextrins and nickel(II) polyazamacrocycles bearing aliphatic pendant arms (n-butyl, n-octyl and n-dodecyl) have been investigated, using redox kinetics as a probe, to estimate binding constants. Electrospray mass spectrometry shows the formation o...
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The binuclear complex bis-(chloropalladium(II))-tetrakis(2-pyridyl)pyrazine chloride, [Pd2Cl2(tppz)]Cl-2 has been synthesized and characterized. The complex shows solvatochromic behaviour in aqueous DMSO solvent mixtures. The kinetics of nucleophilic substitution of the complex by guanine is reporte...
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The close association between marine invertebrates, zooxanthellae, and numerous bacteria gives rise to the question of the identity of the actual producer of secondary metabolites. In fall of 2005, a widespread bleaching event occurred throughout the Caribbean Sea in which some colonies of the gorgo...
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A novel molecular AND logic gate 1 is demonstrated based on the competition between fluorescence and photoinduced electron transfer (PET). It is constructed according to a 'receptor(2)-spacer-fluorophore-spacer-receptor(1)-spacer-fluorophore-sp acer-receptor(2)' format where receptor, is a tertiary ...
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Two dialkyl peroxides, devised as kinetic probes for the heterogeneous electron transfer (ET), are studied using heterogeneous and homogeneous electrochemical techniques. The peroxides react by concerted dissociative ET reduction of the O-O bond. Under heterogeneous conditions, the only products iso...
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Various methods for the enhancement of the fluorescence of the pesticide azinphos-methyl are reported. The addition of hydroxypropyl-beta-cyclodextrin was found to moderately enhance the fluorescence by a factor of three, presumably via inclusion of the pesticide into the cyclodextrin cavity. This c...