A reusable ratiometric two-photon chemodosimeter for Hg2+ detection based on ESIPT and its application in bioimaging

2015 ◽  
Vol 3 (17) ◽  
pp. 3459-3464 ◽  
Author(s):  
Weifang Luo ◽  
Huie Jiang ◽  
Kaiming Zhang ◽  
Wei Liu ◽  
Xiaoliang Tang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Two Photon

A novel reaction-based recyclable two-photon chemodosimeter for Hg2+ detection in nearly aqueous solution was developed, which could be used for bioimaging.

Local Environment of Surface-Polyelectrolyte-Bound DNA Oligomers

2000 ◽  
Vol 651 ◽  
Author(s):  
Sangmin Jeon ◽  
Sung Chul Bae ◽  
Jiang John Zhao ◽  
Steve Granick
Keyword(s):  
Aqueous Solution ◽  
Salt Concentration ◽  
Fluorescence Anisotropy ◽  
Local Environment ◽  
Time Resolved Fluorescence ◽  
Surface Complexes ◽  
Dna Oligomers ◽  
Time Resolved ◽  
Two Photon ◽  
Anisotropy Decay

AbstractTwo-photon time-resolved fluorescence anisotropy methods were used to study the dynamical environment when fluorescent-labelled DNA oligomers (labelled with FAM, 6-fluorescein-6-carboxamido hexanoate) formed surface complexes with quaternized polyvinylpyridine (QPVP) cationic layers on a glass surface. We compared the anisotropy decay of DNA in bulk aqueous solution, DNA adsorbed onto QPVP, and QPVP-DNA-QPVP sandwich structures. When DNA was adsorbed onto QPVP, its anisotropy decay was dramatically retarded compared to the bulk, which means it had very slow rotational motion on the surface. Motions slowed down with increasing salt concentration up to a level of 0.1 M NaCl, but mobility began to increase at still higher salt concentration owing to detachment from the surface-immobilizing QPVP layers.

Fluorescent chemo-sensors based on “dually smart” optical micro/nano-waveguides lithographically fabricated with AIE composite resins

2020 ◽  
Vol 7 (7) ◽  
pp. 1782-1789 ◽  
Author(s):  
Meng-Dan Qian ◽  
Yun-Lu Sun ◽  
Zhi-Yong Hu ◽  
Xiao-Feng Fang ◽  
Jin-Long Zhu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Direct Detection ◽  
Composite Resins ◽  
Two Photon ◽  
On Chip

Single/two-photon-lithographically fabricated “smart” active micro/nano-optics are composed of covalently co-crosslinked SU-8/AIEoxe for the on-chip-integratable direct detection of various VOCs in aqueous solution.

Two-Photon-Absorption Technique for Selective Detection of Copper(II) Ions in Aqueous Solution Using a Dansyl-Pyrene Conjugate

2011 ◽  
Vol 6 (9) ◽  
pp. 2246-2250 ◽  
Author(s):  
Vadapalli Chandrasekhar ◽  
Mrituanjay D. Pandey ◽  
Sandeep Kumar Maurya ◽  
Pratik Sen ◽  
Debabrata Goswami
Keyword(s):  
Aqueous Solution ◽  
Photon Absorption ◽  
Selective Detection ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Absorption Technique

Twophoton absorption of CdTe:Mn quantum dots in aqueous solution

2013 ◽  
Vol 25 (2) ◽  
pp. 350-354
Author(s):  
刘丽炜 Liu Liwei ◽  
李钰 Li Yu ◽  
胡思怡 Hu Siyi ◽  
陶海岩 Tao Haiyan ◽  
陈桂波 Chen Guibo ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Quantum Dots ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon

scholarly journals Поляризованная флуоресценция молекул NADH при двухфотонном возбуждении фемтосекундными лазерными импульсами с длиной волны 720-780 nm

2019 ◽  
Vol 45 (13) ◽  
pp. 37
Author(s):  
М.Э. Сасин ◽  
И.А. Горбунова ◽  
Н.O. Безверхний ◽  
Я.М. Бельтюков ◽  
J. Rubayo-Soneira ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Single Photon ◽  
Laser Pulses ◽  
Time Correlation ◽  
Femtosecond Laser Pulses ◽  
Diffusion Time ◽  
Methanol Solution ◽  
Polarized Fluorescence ◽  
Two Photon ◽  
Photon Excitation

The decay of polarized fluorescence in coenzyme NADH upon two-photon excitation by femtosecond laser pulses at the wavelength range of 720- 780 nm in water/methanol solution has been investigated. Decay fluorescence times tau_1 and tau_2, rotation diffusion time tau_rot, and preexponential factors a_1/a_2 ratio have been determined from experiment. The results obtained have been compared with previous results in NADH in aqueous solution. polarized fluorescence, NADH, adenine, nicotinamide, spectroscopy, time correlation single photon spectroscopy

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