Direct excitation of tryptophan phosphorescence. A new method for triplet states investigation

Direct excitation of tryptophan phosphorescence. A new method for triplet states investigation
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色氨酸磷光的直接激发。

DOI:
10.1088/2050-6120/ac4c9a
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发表时间:
2022
影响因子:
3.2
通讯作者:
I. Gryczynski
I. Gryczynski
中科院分区:
化学3区
文献类型:
--
作者:
J. Chavez;L. Ceresa;John M Reeks;Y. Strzhemechny;J. Kimball;Emma Kitchner;Z. Gryczynski;I. Gryczynski

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研究了色氨酸(TRP)嵌入聚乙烯醇薄膜的室温磷光。在紫外(285 nm)激发下,色氨酸在460 nm附近产生磷光.我们还观察到在410 nm处的蓝光激发下的TRP磷光,远远超出了S0 →S1吸收。这种激发直接到达色氨酸的三重态,而不涉及单重激发态。色氨酸的磷光寿命在亚毫秒范围内。三重态的长波长直接激发导致高的磷光各向异性,这可以通过时间分辨磷光用于大分子动力学研究。
We studied room temperature phosphorescence of tryptophan (TRP) embedded in poly (vinyl alcohol) films. With UV (285 nm) excitation, the phosphorescence spectrum of tryptophan appears at about 460 nm. We also observed the TRP phosphorescence with blue light excitation at 410 nm, well outside of the S0 →S1 absorption. This excitation reaches the triplet state of tryptophan directly without the involvement of the singlet excited state. The phosphorescence lifetime of tryptophan is in the sub-millisecond range. The long-wavelength direct excitation to the triplet state results in high phosphorescence anisotropy which can be useful in macromolecule dynamics study via time-resolved phosphorescence.
DOI: 10.1126/science.3576185
发表时间: 1987-05
期刊: Science
影响因子: 56.9
作者:
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通讯作者: J. Vanderkooi;D. B. Calhoun;S. Englander
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发表时间: 2002-09-04
影响因子: 15
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发表时间: 1989
期刊: Biochimica et biophysica acta
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