International Scholarly Research Notices

Research Article

Linear and Angular Distyrylpyrazines with Terminal Donor Groups: Synthesis, Solvatochromism, and Acidochromism of the Electronic Spectra

Table 3

Acidochromism of distyrylpyrazines 1–10 in dichloromethane and dichloromethane/TFA.
Entry 𝜆 m a x DCM 𝜆 m a x 10−5 M TFA 𝜆 m a x 10−4 M TFA 𝜆 m a x 10−3 M TFA 𝜆 m a x 10−2 M TFA 𝜆 m a x 10−1 M TFA 𝜆 m a x 1 M TFA
1  𝜆 m a x 383383383386400433450
𝜆 F m a x 432432432433512524535
2  𝜆 m a x 377376377374373371379
𝜆 F m a x 423423423439445445460
3  𝜆 m a x 402399403402402484501
𝜆 F m a x 465464465465463
4  𝜆 m a x 409409410410411498506
𝜆 F m a x 476477477478477
5  𝜆 m a x 402401402403424392 (490 sh)428 (490 sh)
𝜆 F m a x 489491488490488
6  𝜆 m a x 405405405405408408512
𝜆 F m a x 495495495495495495
7  𝜆 m a x 427427427427432532513
𝜆 F m a x 501501501501500410
8  𝜆 m a x 400399400407468489499
𝜆 F m a x 463463462462
9  𝜆 m a x 395396398407476489502
𝜆 F m a x 461463463462
10  𝜆 m a x 381378381386401444451
𝜆 F m a x 474476476477