نتایج جستجو برای: 4 bipyridinium
تعداد نتایج: 1303753 فیلتر نتایج به سال:
We report the synthesis of two [2]catenane-containing struts that are composed of a tetracationic cyclophane (TC(4+)) encircling a 1,5-dioxynaphthalene (DNP)-based crown ether, which bears two terphenylene arms. The TC(4+) rings comprise either 1) two bipyridinium (BIPY(2+)) units or 2) a BIPY(2+) and a diazapyrenium (DAP(2+)) unit. These degenerate and nondegenerate catenanes were reacted in t...
Abstract The current study presents a new class of functional derivatives ( 1–3 ) consisting dicationic viologen (4,4’-bipyridinium unit) V 2+ capped by nucleobases thymine NB 1 ), adenine 2 thymine/adenine , and ion-paired with amphiphilic anion 3,4,5-tris(dodecyloxy)benzene sulfonate DOBS − ). target our work focuses on the design synthesis molecular building blocks in which three different f...
Soybean (Glycine max.) is one of the most important legumes cultivated worldwide. Its productivity can be altered by some biotic and abiotic stresses like global warming, soil metal pollution or over-application herbicides paraquat (1,1’-dimethyl-4,4’-bipyridinium dichloride). In this study, effect oxidative stress produced addition (0, 20, 50 100 µM) during plant growth on symbiotic nitrogen f...
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