Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... Three 3,4-dichalcogen-bridged fluoranthenes were prepared with a view of developing new electron donors. Their donor strength was observed to increase in order of the chalcogen triad, ie, sulfur, selenium, and tellurium. ... H. Okada, Y. Sato, Y. Kimuraand M. Kaneko, ...