Cover: The cover picture shows the molecular architecture and the absorption and emission spectra of a novel rod-like polyyne polymer comprised of an electron-rich platinum framework and an electron-accepting silole unit that features an alternating donor-p-acceptor (D-p-A) type structural motif. This polymer exhibits a very low band gap and interesting optoelectronic properties.Further details can be found in the Communication
The development of symmetric and unsymmetric platinum(II) bis(acetylide)s as highly transparent optical limiters is described by Wong and co-workers. Their excited state character is governed by electronic structure, which signifi cantly affects their photophysical properties and optical power limiting (OPL) behavior. The sound OPL responses and low OPL thresholds together with their excellent optical transparency render these materials very promising candidates for practical devices for the protection of human eyes and other delicate electro-optic sensors.
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