nm). As the only exception, the 9-(N,N-dimethylaminophenyl)benzo[b]quinolizinium exhibits pronounced solvatochromic behavior (H2O: λabs = 422 nm; MeCN: λabs = 474 nm; CH2Cl2: λabs = 507 nm) due to the strong donor-acceptor interplay in the cationic chromophore. Depending on the donor strength of the aryl substituent, the benzo[b]quinolizinium derivatives exhibit fluorescence bands in water with long-wavelength
容易得到的苯并[芳基化b ] quinolizinium -9-
硼酸与碳环或杂环bromoarenes在
钯催化剂的存在下[将Pd(
DPPF)
氯2 CH 2
氯2或Pd(PPH 3)2
氯2 ]给出相应的阳离子联芳基产品,产率为15-81%。所有芳基取代的苯并[ b ]
喹啉鎓(rid啶鎓)衍
生物在
水中的最大吸收波长在409至422 nm之间,在不同溶剂中变化很小(Δλ<10 nm)。唯一的例外是9-(N,N-二甲基氨基苯基)苯并[ b由于喹啉 在阳离子生色团中强烈的供体-受体相互作用,因此显示出显着的溶剂变色行为(H 2 O:λabs = 422 nm; MeCN:λabs = 474 nm; CH 2 Cl 2:λabs = 507 nm)。取决于芳基取代基的供体强度,苯并[ b ]喹啉鎓衍生物在
水中显示出荧光带,其长波最大值在λfl = 452 nm(R =苯基)和529 nm(R =