Correction to Bright, Color-Tunable Fluorescent Dyes Based on π

Addition/Correction pubs.acs.org/OrgLett

Correction to Bright, Color-Tunable Fluorescent Dyes Based on π‑Expanded Diketopyrrolopyrroles Marek Grzybowski, Eliza Glodkowska-Mrowka, Tomasz Stoklosa, and Daniel T. Gryko* Org. Lett. 2012, 14 (11), 2670−2673. DOI: 10.1021/ol300674v S Supporting Information *

rong calibration of fluorescence spectrometer at the time of original emission measurements led to wrong values of fluorescence quantum yields for diketopyrrolopyrroles described. We present here the correct values obtained during scrupulous measurements performed with a freshly calibrated apparatus. We also present slightly corrected absorption and emission spectra of π-expanded diketopyrrolopyrroles. Page 2673, Table 2 should read:

W

Table 2. Spectroscopic Data of Diacetals 2a−f and Products of Their Electrophilic Cyclizations 3a−f compd

solvent

λabs (nm)

2a 2b 2c 2d 2e 2f 3a

CHCl3 CHCl3 CHCl3 CHCl3 CHCl3 CHCl3 CHCl3 DMF CHCl3 DMF CHCl3 DMF CHCl3 DMF CHCl3 DMF CHCl3 DMF

495 496 533 493 580 595 593 593 590 592 605 605 575 575 643 645 648 648

max

3b 3c 3d 3e 3f

λem (nm)

Stokes shift (cm−1)

εmax (M−1 cm−1)

Φfl

538 541 557 524 594 613 597 602 597 602 609 618 578 586 651 658 653 660

1610 1680 810 1200 410 490 110 250 200 280 110 350 90 330 190 310 120 280

23000 31000 24000 24000 75000 83000 110000 91000 97000 135000 64000 62000 71000 68000 110000 107000 89000 58000

0.90a 0.90a 0.70b 0.90a 0.75b,c 0.75b,c 0.85c 0.70c 0.80c 0.70c 0.75c 0.62c 0.80c 0.73c 0.99d 0.60c 0.70d 0.50c

max

Figure S-1. Absorption and normalized fluorescence emission spectra of π-expanded DPPs measured in CHCl3.

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ASSOCIATED CONTENT

S Supporting Information *

Corrected version of the Supporting Information. This material is available free of charge via the Internet at http://pubs.acs.org.

Φfl reference: fluorescein in 0.1 M NaOH (Φfl = 0.9). bΦfl reference: rhodamine 6G in EtOH (Φfl = 0.94). cΦfl reference: Cresyl Violet in MeOH (Φfl = 0.54). dΦfl reference: Nile Blue in EtOH (Φfl = 0.27).

a

In the Supporting Information, page 2, Figure S-1 has been corrected as shown.

Published: January 2, 2015 © 2015 American Chemical Society

394

DOI: 10.1021/ol5035782 Org. Lett. 2015, 17, 394−394