The DOI matches its Crossref record; 2 of the 2 references it cites were found in a registry or an index.
An AIE-active hemicyanine fluorogen with stimuli-responsive red/blue emission: extending the pH sensing range by “switch + knob” effect
Abstract
In this work, a red-emissive zwitterionic hemicyanine dye, named TPE–Cy, containing tetraphenylethene (TPE) and N-alkylated indolium is designed and synthesized. TPE–Cy inherits the aggregation-induced emission (AIE) feature of TPE and displays a large Stokes shift (>185 nm), overcoming the limitations of the concentration-quenching effect and small Stokes shift (from a few to 20 nm) encountered by conventional cyanine dyes. By taking advantage of the photophysical AIE property and chemical reactivity towards OH−/H+, TPE–Cy is able to sense pH in a broad range (the broadest to date) by showing different emission colors and intensities: strong to moderate red emission at pH 5–7, weak to no emission at pH 7–10, and no emission to strong blue emission at pH 10–14. The acid/base-switched red/blue emission transition is reversible and can be repeated for many cycles. By means of NMR and HRMS analyses, we have drawn a mechanistic picture at molecular level to illustrate how this dye works as a pH-sensitive fluorescent probe.
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Cites
Aggregation-induced emission of 1-methyl-1,2,3,4,5-pentaphenylsilole
Luo, J., Xie, Z., Lam, J. W. Y., Cheng, L., Tang, B. Z., Chen, H., Qiu, C., Kwok, H. S., Zhan, X., Liu, Y., et al. (2001) · Chemical Communications · doi:10.1039/b105159h · Cited by 8,358
Self-citationHong, Y., Lam, J. W. Y., & Tang, B. Z. (2011) · Chemical Society Reviews · doi:10.1039/c1cs15113d · Cited by 6,363
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Cited by
Aggregation-Induced Emission: Together We Shine, United We Soar!
Mei, J., Leung, N. L. C., Kwok, R. T. K., Lam, J. W. Y., & Tang, B. Z. (2015) · Chemical Reviews · doi:10.1021/acs.chemrev.5b00263 · Cited by 8,270
Self-citationAggregation‐Induced Emission: The Whole Is More Brilliant than the Parts
Mei, J., Hong, Y., Lam, J. W. Y., Qin, A., Tang, Y., & Tang, B. Z. (2014) · Advanced Materials · doi:10.1002/adma.201401356 · Cited by 3,381
Self-citationAggregation-Induced Emission Luminogens for Activity-Based Sensing
Wang, D., & Tang, B. Z. (2019) · Accounts of Chemical Research · doi:10.1021/acs.accounts.9b00305 · Cited by 510
Self-citationChen, S., Hong, Y., Liu, Y., Liu, J., Leung, C. W. T., Li, M., Kwok, R. T. K., Zhao, E., Lam, J. W. Y., Yu, Y., et al. (2013) · Journal of the American Chemical Society · doi:10.1021/ja400337p · Cited by 434
Self-citationLiu, Y., Zhang, Z., Hou, X., Ding, Q., Zeng, S., Shen, H., Gong, W., Ding, T., Mahmood, Z., Zeng, X., et al. (2025) · Advanced Materials · doi:10.1002/adma.202420006 · Cited by 30
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Metadata
- Authors
- Chen, S., Liu, J., Liu, Y., Su, H., Hong, Y., Jim, C. K. W., Kwok, R. T. K., Zhao, N., Qin, W., Lam, J. W. Y., Wong, K. S., & Tang, B. Z.
- Venue
- Chemical Science
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2012
- Volume
- 3
- Issue
- 6
- Pages
- 1804
- ISSN
- 2041-6520 (ISSN-L)
- 2041-6539
- OpenAlex
- W2068619971
- Cited by
- 190
- References
- 2
- FWCI
- 8.54
- Type
- journal article
- Language
- en
- Open access
- closed
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- Chen, S., Liu, J., Liu, Y., Su, H., Hong, Y., Jim, C. K. W., Kwok, R. T. K., Zhao, N., Qin, W., Lam, J. W. Y., Wong, K. S., & Tang, B. Z. (2012). An AIE-active hemicyanine fluorogen with stimuli-responsive red/blue emission: extending the pH sensing range by “switch + knob” effect. Chemical Science. https://doi.org/10.1039/c2sc01108e
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