Photoactive polysaccharides

Abstract

a b s t r a c tLight is a non-invasive stimulus or probe, which retains more and more attention in science and technology. In the present review the reader is informed about the important issue of the interactions of polysaccharides and light. Considering some aspects of polysaccharide structure and properties, topics such as absorption and fluorescence of polysaccharides, the structural analysis using light as a probe, and creation of new materials by combining chromophores and polysaccharides are discussed. Attention is also be given to polysaccharide derivatives, where absorption of light induces structural changes, including photocrosslinking and photochromism.

Light‐Triggered Multifunctionality at Surfaces Mediated by Photolabile Protecting Groups

“…[103][104][105][106][107][108][109] When PRPGs are attached to polymer brushes, the physicochemical properties of the surface can be changed upon light exposure. [110][111][112][113] Reported examples are based on PRPGs attached to ionizable side groups along the brush chain. For example, brushes of poly(acrylic acid) with 4,5-dimethoxy-2-nitrobenzyl (DMNB) attached to the COOH side groups were obtained by surface-initiated atom transfer radical polymerization (SI-ATRP) of the DMNB-protected methacrylic monomer.…”

Effect of ultraviolet processing on selected properties of egg white

“…The latter are associated to the development of photoreactions involving biopolymers. Polymer photoreaction is far from being a novel technology: ancient Egyptians and Babylonians exploited photoreactions to mummify corpses and waterproof papyrus boats (Decker & Bendaikha, 1998;Wondraczek, Kotiaho, Fardim, & Heinze, 2011).…”

“…The common feature of photoresponsive polymers is the presence of a chromophore inside the macromolecular matrix (Wondraczek et al, 2011). At first, the electromagnetic energy is captured by a chromophore, and converted into chemical energy allowing photoisomerisation.…”

Chemically Modified Natural Polysaccharides to Form Gels

“…This method has been utilized to convert methylcellulose, dextran, and other polysaccharides into a form that had varying water/organic solubility based upon light exposure. More information can be found in a review article (Wondraczek et al 2011). …”