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Meng TT, Wang H, Zheng ZB, et al. pH-Switchable "Off-On-Off" Near-Infrared Luminescence Based on a Dinuclear Ruthenium(II) Complex. Inorg Chem. 2017;56(9):4775-4779doi: 10.1021/acs.inorgchem.7b00223.
Meng, T. T., Wang, H., Zheng, Z. B., & Wang, K. Z. (2017). pH-Switchable "Off-On-Off" Near-Infrared Luminescence Based on a Dinuclear Ruthenium(II) Complex. Inorganic chemistry, 56(9), 4775-4779. https://doi.org/10.1021/acs.inorgchem.7b00223
Meng, Ting-Ting, et al. "pH-Switchable "Off-On-Off" Near-Infrared Luminescence Based on a Dinuclear Ruthenium(II) Complex." Inorganic chemistry vol. 56,9 (2017): 4775-4779. doi: https://doi.org/10.1021/acs.inorgchem.7b00223
Meng TT, Wang H, Zheng ZB, Wang KZ. pH-Switchable "Off-On-Off" Near-Infrared Luminescence Based on a Dinuclear Ruthenium(II) Complex. Inorg Chem. 2017 May 01;56(9):4775-4779. doi: 10.1021/acs.inorgchem.7b00223. Epub 2017 Apr 07. PMID: 28387505.
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Inorg Chem. 2017 May 01;56(9):4775-4779. doi: 10.1021/acs.inorgchem.7b00223. Epub 2017 Apr 07.

pH-Switchable "Off-On-Off" Near-Infrared Luminescence Based on a Dinuclear Ruthenium(II) Complex.

Inorganic chemistry

Ting-Ting Meng, Hao Wang, Ze-Bao Zheng, Ke-Zhi Wang

Affiliations

  1. Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University , Beijing 100875, P. R. China.

PMID: 28387505 DOI: 10.1021/acs.inorgchem.7b00223

Abstract

The pH-switchable room-temperature near-infrared (NIR) phosphorescence emission based on ruthenium(II) polypyridyl complexes has been very rarely reported, even though it is very desirable for applications in sensing, switching, and logic molecular devices and bioimaging. Here we report a novel dinuclear ruthenium(II) complex in an aerated acetonitrile solution featuring a bright NIR emission centered at 760 nm with an absolute quantum yield of 1.03%, a large Stokes shift of 254 nm, and a long emission lifetime of 108.3 ± 0.4 ns. The complex in a Britton-Roberson buffer also exhibited pH-induced "off-on-off" NIR luminescent switches with a maximum intensity enhancement factor of 41 and one of the switching events occurring near the physiological pH range.

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