Research Article
Linear and Angular Distyrylpyrazines with Terminal Donor Groups: Synthesis, Solvatochromism, and Acidochromism of the Electronic Spectra
Table 2
Solvatochromism of distyrylpyrazines
1–10,
/nm,
ε /L mol
−1 cm
−1;
[
35].
| Comp. | | Cyclohexane | Toluene | Dichloromethane | Acetonitrile | Ethanol | (DCM) |
| | | 0.006 | 0.099 | 0.309 | 0.460 | 0.654 | | 1 | | 382 | 386 | 383 | 379 | 381 | 43537 | | | 424 | 428 | 432 | 429 | 443 | | 2 | | 376 | 379 | 377 | 373 | 374 | 46865 | | | 415 | 422 | 423 | 419 | 428 | | 3 | | 399 | 405 | 402 | 397 | 400 | | | | 439 | 453 | 465 | 463 | 482 | | 4 | | 407 | 413 | 409 | 407 | 407 | | | | 448 | 463 | 476 | 478 | 501 | | 5 | | 402 | 406 | 402 | 399 | 400 | | | | 449 | 463 | 489 | 499 | 514 | | 6 | | 404 | 408 | 405 | 398 | 403 | 61976 | | | 451 | 463 | 495 | 504 | 520 | | 7 | | 423 | 427 | 427 | 420 | 423 | 58692 | | | 464 | 478 | 501 | 501 | 517 | | 8 | | 400 | 404 | 400 | 397 | 400 | | | | 440 | 453 | 463 | 462 | 482 | | 9 | | 391 | 397 | 395 | 395 | 397 | | | | 427 | 443 | 461 | 471 | 498 | | 10 | | 376 | 380 | 381 | 383 | 382 | | | | 424 | 446 | 474 | 495 | 513 | |
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