six new complexes of the type trans-[lco((do)(doh)pn)l'] where (do)(doh)pn= n2, n2'-propanediolbis (2,3-butanedione 2-imine 3-oxime), l-cl¯ and l'=mono-anaion of phenylcyanamide (pcyd), 2,5-dichlorophenylcyanamide (2,5-cl2 pcyd), 2,4-dimethyl pehylcyanamide (2,4-me2 pcyd) and l=l'=pcyd, 2,5-cl2 pcyd, 2,4-me2 pcyd, have been synthesized and characterized by elemental analysis, spectroscopy and c...

electrochemical behavior of the new mono and dinuclear co (iii)  complexes of  the types trans-[pyco((do)(doh)pn )(l)]pf6   and [{py co((do)(doh)pn)}2 (μ-dicyd)] (pf6)2   have been studied in acetonitrile solution.  all the  mono nuclear complexes  show two quasi- reversible reduction couples associate  to co(iii/ii)and  co(ii/i). each of these redox couples split to two  one electron  waves in...

PUSH-PULL MOLECULES: MODELS AND POLYMER BUILDING BLOCKS FOR ORGANIC PHOTOVOLTAIC APPLICATIONS FEBRUARY 2014 RAYMOND DEVAUGHN, B.S., UNIVERSITY OF THE DISTRICT OF COLUMBIA M.S., UNIVERSITY OF MASSACHUSETTS AMHERST Directed by: Professor Paul M. Lahti Several fluorenone alkynyl based oligo conjugated molecules were synthesized and characterized. Most compounds exhibited UV---Vis absorption onset ...

The present investigation describes for the first time, the synthesis and detailed characterization of a novel fluorescent and amphiphilic chitosan polymer (3) containing fluorescent peryleneimide chromophores for biomedical applications. The polymer 3 is moderately soluble in a wide range of organic solvents and aqueous solutions, unlike chitosan (2). The Mw of 3 and 2 determined by GPC were 4...

Electrochemical behavior of the new mono and dinuclear Co (III)  complexes of  the types trans-[pyCo((DO)(DOH)pn )(L)]PF6   and [{py Co((DO)(DOH)pn)}2 (μ-dicyd)] (PF6)2   have been studied in acetonitrile solution.  All the  mono nuclear complexes  show two quasi- reversible reduction couples associate  to Co(III/II)an...

Six new complexes of the type trans-[LCo((DO)(DOH)pn)L'] where (DO)(DOH)pn= N2, N2'-propanediolbis (2,3-butanedione 2-imine 3-oxime), L-Cl¯ and L'=mono-anaion of phenylcyanamide (pcyd), 2,5-dichlorophenylcyanamide (2,5-Cl2 pcyd), 2,4-dimethyl pehylcyanamide (2,4-Me2 pcyd) and L=L'=pcyd, 2,5-Cl2 pcyd, 2,4-Me2 pcyd, have been s...

The electrochemical behaviour of 2,8-dihydroxyadenine (2,8-DHA)- the main adenine oxidation product- has been investigated over a wide pH range at a glassy carbon electrode (GCE) using cyclic, differential pulse and square wave voltammetry. The oxidation of 2,8-DHA is a quasi-reversible process, pH dependent and occurs with the formation of a main oxidation product, P(2,8-DHA), that strongly ad...

There exist several works that study the class of reversible languages defined as the union closure of 0-reversible languages, their properties and suitable representations. In this work we define and study the class of locally reversible languages, defined as the union closure of k-reversible languages. We characterize the class and prove that it is a local (positive) variety of formal languag...

A series of vanadium-substituted Dawson-structure POM-type ionic liquids, [TEAPS]7P2W17VO62 and [TEAPS]9P2W15V3O62, bearing sulfo-group grafted ammonium (TEAPS) cations and Dawson-type polyoxoanions have been formed which are reversible-thermal-response type gels. These gel-type compounds exhibit a phase transition from a quasi-solid gel phase to an isotropic sol phase. What's more, this series...

Methotrexate (MTX) is an antimetabolite of folic acid indicated in the treatment of a variety of cancers. The electrochemical behaviour of MTX on a glassy carbon electrode was investigated. The MTX oxidation is a complex, pH-dependent, diffusion-controlled irreversible process and proceeds with the transfer of two electrons and two protons and the formation of one electroactive product, 7-hydro...