Tetraalkoxy -substituted

EL from tetraalkoxy-substituted PPV 20, synthesized by Gilch polymerization, was recently reported [84], A multilayer device ITO/PEDOT/20/PBD/LiF/Al with PBD as an ETL emits green-yellow light with a luminescent efficiency of 0.121m/W, a maximum brightness of 8200 cd/m2, and a turn-on voltage of 5 V. 

Wong and coworkers synthesized a group of tetraalkoxy-substituted tetraphenylenes 124 and 126 In both racemic and chiral forms, as shown in Scheme 5.30 [56]. Their liquid crystalline studies demonstrated that racemic compounds 126, possessing four long chains of and/or -(CH2CH20) CH3,... 

A series of tetraalkoxy and dialkoxy-substituted 21,23-dithiaporphyrins 240c and 21-monothiaporphyrins 241c with methoxy, butoxy, octy-loxy, and dodecyloxy substituents at (5-thiophene carbon atoms were also synthesized (02JCS(CC)2642,04T10671). 

Most chemical properties typical of tetraalkoxy(aroxy)silanes also characterise substituted ethers of orthosilicon acid, with the only difference that the reactivity of the ether group is greatly affected by the type and number of organic radicals directly at the silicon atom. 

Molybdenum pentachloride smoothly reacts with 1,2-dialkoxybenzenes or 4-substituted-l,2-dialkoxybenzenes to give hexaalkoxytriphenylenes or tetraalkoxy-disubstituted biphenyls in good to excellent yields tolerating several labile groups including ester, acetal, triisopropylsilyl, etc [79,80]. 

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