Polarimetry, Circular Dichroism, Calorimetry, and Related Studies

Polarimetry, Circular Dichroism, Calorimetry and Related Studies 

The chirality induced in styrene-containing co-polymers (post-glycosidic hydrolysis) as a consequence of using carbohydrate-bearing monomers (L-threitol, a-D- 

A study of the relaxational transitions and related heat capacity anomalies for galactose and fructose has been described which employs calorimetric methods. The kinetics of solution oxidation of L-ascorbic acid have been studied using an isothermal microcalorimeter. Differential scanning calorimetry (DSC) has been used to measure solid state co-crystallization of sugar alcohols (xylitol, o-sorbitol and D-mannitol), and the thermal behaviour of anticoagulant heparins. Thermal measurements indicate a role for the structural transition from hydrated P-CD to dehydrated P-CD. Calorimetry was used to establish thermodynamic parameters for (1 1) complexation equilibrium of citric acid and P-CD in water. Several thermal techniques were used to study the decomposition of p-CD inclusion complexes of ferrocene and derivatives. DSC and derivative thermogravimetric measurements have been reported for crystalline cytidine and deoxycytidine. Heats of formation have been determined for a-D-glucose esters and compared with semiempirical quantum mechanical calculations.  

Spectrophotometric methods have been applied to inclusion complexes of a-and p-CDs with methyl orange (in the presence of alcohols). A report on a symposium on spectroscopic and thermodynamical studies of metal-amino sugar complexes was published. Electronic absorption and fluorescence spectra of L-ascrobic acid have been studied at a range of pH values.  

Atomic Force Microscopy (AFM) has been used to characterize the differing supramolecular structures of A -alkyl-D-gluconamide adsorbates and N- n-alkyl)-A -D-maltosylsemicarbazone adsorbates (on silica, graphite). An analysis of a P-CD fibre-optic chemical sensor (pyrene binding) has been discussed.  

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