In contrast to the fluorescent response of ZTRS to metal ions
in aqueous solutions, in 100% CH3CN Zn2+ and Cd2+ result in
blue-shifted emissions with the maximum wavelength change
from 481 to 430 and 432 nm, respectively (Supporting Information,
Figures S4, S5); however, the addition of Zn2+ and Cd2+
to ZTRS in 100% DMSO cause red-shifted emissions with the
maximum wavelength change from 472 to 512 and 532 nm,
respectively (Supporting Information, Figures S6, S7). The
Figure 1. Influence of pH on the fluorescence of ZTRS in acetonitrile/water (50:50, v/v). Excitation wavelength: 360 nm. [ZTRS] ) 10 μM. (a) pH
4.7-12.8. Inset: The fluorescence intensity at 483 nm as a function of pH; (b) pH 4.7-1.8. Inset: The ratiometric fluorescence changes as a function of pH.
Figure 2. (a) Fluorescence spectra of 10 μM ZTRS in the presence of various metal ions in aqueous solution (CH3CN/0.5 M HEPES (pH 7.4) ) 50:50).
Excitation at 360 nm. (b) Fluorescence spectra of ZTRS in the presence of different concentrations of Zn2+. The inset shows the Job plot evaluated from
the fluorescence with a total concentration of 10 μM.addition of other HTM ions results in blue-shift in emissions
in both CH3CN and DMSO (Supporting Information, Figures
S8, S9). However, a small blue-shift of the absorption maximum
of ZTRS in CH3CN, DMSO, and aqueous solution upon
addition of Zn2+ and Cd2+ (Supporting Information, Figures
S10-S15) indicates that the red-shifted emission does not result
from the deprotonation of amide NH group, because the
deprotonation of the NH group conjugated to 1,8-naphthalimide
would cause a red-shift in absorption spectra. 18h,25a These
spectral data suggest that ZTRS binds Zn2+ and Cd2+ in
different tautomeric forms, depending on the solvent and metal
ions (Scheme 3); ZTRS complexes both Zn2+ and Cd2+ in the
amide tautomer in CH3CN, and the imidic acid tautomer in
DMSO predominantly. However, other HTM ions bind to the
amide tautomer in both CH3CN and DMSO.
Further evidence for the amide and imidic acid tautomeric
binding modes (Scheme 3) is provided by 1H NMR titration
experiments of ZTRS with Zn2+ and Cd2+ in CD3CN (Supporting
Information, Figures S16, S17) and DMSO-d6 (Supporting
Information, Figures S18, S19), 2D NOESY of ZTRS
/Zn2+ (1:1 complex) in CD3CN (Figures 3, Supporting Information,
Figures S20, S21) and DMSO-d6 (Figures 3, S22-23),
and IR spectra of ZTRS/Zn2+ (1:1 complex) in CH3CN
(Supporting Information, Figure S24) and DMSO (Supporting
Information, Figure S25). As a reference, the binding properties
of ZTF with Zn2+ were also examined by means of 1H NMR
and IR spectra.
急求一篇化学相关的英文文献,要求有中文翻译、论文内容为分子结构和光...
In contrast to the fluorescent response of ZTRS to metal ions in aqueous solutions, in 100% CH3CN Zn2+ and Cd2+ result in blue-shifted emissions with the maximum wavelength change from 481 to 430 and 432 nm, respectively (Supporting Information,Figures S4, S5); however, the ad...
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化工类英文资料译中文
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翻译英文文献,有些不懂的,希望大家帮忙翻译一下,比较着急,麻烦大家了...
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请英文高手翻译个化学专业的论文 并想交个朋友 谢谢 急用的!
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化工英语文献翻译
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