Solidification and thermal degradation of printable,stretchable electrical conductor from waterborne polyurethane and silver flakes

Journal of Thermal Analysis and Calorimetry - In this study, we prepared high-performance printable, stretchable electrical conductor from waterborne polyurethane and micro-silver flakes. The...     

Dinitriles Bearing AIE‐Active Moieties: Synthesis,E/Z Isomerization,and Fluorescence Properties

Dinitriles bearing aggregation‐induced emission (AIE)‐active moieties [tetraphenylethylene (TPE) or diphenylphenanthrene (DPP)] were prepared. Compounds 4 (TPE‐linked) and 8 (DPP‐linked) showed considerably redshifted emission resulting from their large Stokes shifts and also strong fluorescence in the aggregated and solid states. Pure E and Z stereoisomers of both dinitriles were easily separated, and their isomerization equilibria and fluorescence properties were investigated. In addition to their pronounced AIEE behavior, 4 and 8 also showed various reversible chromic responses to external stimuli, namely, solvato‐, piezo‐, vapo‐, and thermochromism, which make them potential candidates for smart materials.     

2‐benzothiazolyl phenacyl sulfoxide,a new precursor for 2‐oxo‐2‐phenylethanethial

Previously, a facile formation of a thioaldehyde by the thermolysis of a heteroaryl phenacyl sulfoxide was confirmed by the detection of a cycloadduct with 2,3‐dimethyl‐1,3‐butadiene. The usefulness of benzothiazolyl phenacyl sulfoxide as a precursor for 2‐oxo‐2‐phenylethanethial was studied under the same conditions in the presence of various dienes and anthracene. In all cases, the Diels‐Alder cycloadducts were formed in moderate to good yields, and the addition of triethylamine as external base was revealed to be effective for carrying out the thermolysis under milder reaction conditions and for the improvement of yields. © 1999 John Wiley & Sons, Inc. Heteroatom Chem 10: 363–367, 1999