bis-ester-bridged stilbenes just in two steps from aldehydes. Thus, the obtained fully fused tetracyclic π-systems have a pyrano[3,2-b]pyran-2,6-dione (PPD) core on their center, showing two reversible reductions at low potentials. In addition, their photoluminescence properties are strikingly affected by the aromatic rings fused to the PPD core; bis-thieno-fused PPDs are found to be excellent fluorophores
已开发出
钯催化的
安息香双羰基双环化反应,该反应仅需两个步骤即可实现
醛类双酯桥联的
对苯二酚的合成。因此,获得的完全稠合的四环π系统在其中心具有
吡喃并[3,2 - b ]
吡喃-2,6-二酮(PPD)核,在低电势下显示出两个可逆的还原。另外,它们的光致发光特性受到与PPD核稠合的芳香环的显着影响。发现双
噻吩并稠合的PPD是优异的荧光团,量子产率高达0.98。