Abstract: The invention relates to novel compounds containing one or more units derived from 2,6-disubstituted-[1,5]naphthyridine or 1,6-disubstituted-1H-[1,5]naphthyridine-2-one, to methods for their preparation and educts or intermediates used therein, to mixtures and formulations containing them, to the use of the compounds, mixtures and formulations as organic semiconductors in organic electronic (OE) devices, especially in organic photovoltaic (OPV) devices and organic photodetectors (OPD), and to OE, OPV and OPD devices comprising these compounds, mixtures or formulations.

Abstract: The invention relates to novel compounds containing one or more units derived from 2,6-disubstituted-[1,5]naphthyridine or 1,6-disubstituted-1H-[1,5]naphthyridine-2-one, to methods for their preparation and educts or intermediates used therein, to mixtures and formulations containing them, to the use of the compounds, mixtures and formulations as organic semiconductors in organic electronic (OE) devices, especially in organic photovoltaic (OPV) devices and organic photodetectors (OPD), and to OE, OPV and OPD devices comprising these compounds, mixtures or formulations.

Abstract: A communication switch circuit is provided by which quasi-duplex communication may be had between a telephone party and a mobile unit in a simplex two-way radio communication system. Specifically, the communication switch circuit includes (i) a keying circuit to selectively energize a transmitter and (ii) an interrupt circuit to intermittently, temporarily deenergize the transmitter to permit reception from a mobile unit. The communication switch circuit further includes a control circuit which prevents reenergizing of the transmitter if a signal is received from a mobile unit while the transmitter is temporarily deenergized thereby permitting a mobile unit to interrupt the telephone party and interject a comment. The communication switch circuit also includes control circuits which permit a mobile unit to initiate and terminate calls.