求翻译化学文献一段Probes 2-4 were obtained using similar synthetic routes(Scheme 2). By starting with 10-allyl-9(10H)-acridone (8),platinum-catalyzed hydrosilylation of terminal alkene producedtriisopropoxy silane-modified acridone (9). Coup

求翻译化学文献一段Probes 2-4 were obtained using similar synthetic routes(Scheme 2). By starting with 10-allyl-9(10H)-acridone (8),platinum-catalyzed hydrosilylation of terminal alkene producedtriisopropoxy silane-modified acridone (9). Coup
求翻译化学文献一段
Probes 2-4 were obtained using similar synthetic routes
(Scheme 2). By starting with 10-allyl-9(10H)-acridone (8),
platinum-catalyzed hydrosilylation of terminal alkene produced
triisopropoxy silane-modified acridone (9). Coupling
of 9 with a substituted phenyl Grignard reagent followed by
counterion exchange yielded various 9-phenyl acridinium
derivatives (2-4). The bulky triisopropoxy silane group in
9 can prevent the Grignard reagent from undergoing nucleophilic
substitution to yield phenyl silane byproducts,22 as well
as being used to further derive solid supports.
Photospectroscopic features of probes 1-4 were characterized
by UV-vis absorption and fluorescence emission. Probe
1 exhibited three absorption bands appearing at 261 (ε )
64 900 M-1 cm-1), 360 (ε ) 15 070 M-1 cm-1), and 419 (ε
) 4060 M-1 cm-1) nm, respectively; a blue-green fluorescence
appeared at 495 nm in CH3CN. The longest wave-lengths of probes 2, 3, and 4 in CH2Cl2 were red-shifted to
448, 430, and 430 nm, respectively, owing to a charge shift
process between the methoxy phenyl ring (electron donor
group) and the acridinium salts (Figure S1 in Supporting
Information).23 Probes 2 and 3 displayed a yellow fluorescence
around 536 nm, while 2 exhibited a fluorescence
intensity 16-fold higher than that of 3, whereas fluorescence
was scarcely visible in 4.

求翻译化学文献一段Probes 2-4 were obtained using similar synthetic routes(Scheme 2). By starting with 10-allyl-9(10H)-acridone (8),platinum-catalyzed hydrosilylation of terminal alkene producedtriisopropoxy silane-modified acridone (9). Coup
探测剂2－4是用类似的合成路线（方案2）获得的.从10丙烯基-9(10H)吖啶酮（8）开始,端烯烃的铂催化硅氢化作用产生了三异丙酯硅氧烷改性的吖啶酮（9）.9与被取代的苯基格氏试剂的偶联,然后进行反离子交换就产生各种不同的9苯基吖啶盐衍生物（2－4）.
在9中的巨大的三异丙酯硅氧烷基团可以防止格氏试剂经受亲核取代作用而产生苯基硅氧烷副产物,22 以及被用于进一步衍生出固体的载体.
探测剂1－4的光分光特点可用紫外可见吸收和荧光发射来表征.探测剂1呈现出三个吸收带,分别出现在261nm（ε＝64 900M－1cm－1）、360nm（ε＝15 070M－1cm－1）和419nm（ε＝4060M－1cm－1）；蓝绿色的荧光在CH3CN中出现在495nm处.在CH2Cl2中探测剂2、3、4的最长波长,由于甲氧基苯基环（电子供体基团）与吖啶盐之间的电荷偏移过程而分别红偏到448、430和430nm（支持信息中的图S1）.23 探测剂2和3在536附近显示了黄色的荧光,而2比3显示了高出16倍的荧光光强,与此同时,4的荧光很难看出.