麻烦翻译下Figure 1 displays the emission spectraFigure 1 displays the emission spectra changes of QB uponthe addition of an increasing amount of Zn2+ and Cd2+. FreeQB showed weak fluorescence emission at 405 nm uponexcitation at 295 nm (ε ) 0.8

麻烦翻译下Figure 1 displays the emission spectraFigure 1 displays the emission spectra changes of QB uponthe addition of an increasing amount of Zn2+ and Cd2+. FreeQB showed weak fluorescence emission at 405 nm uponexcitation at 295 nm (ε ) 0.8
麻烦翻译下Figure 1 displays the emission spectra
Figure 1 displays the emission spectra changes of QB upon
the addition of an increasing amount of Zn2+ and Cd2+. Free
QB showed weak fluorescence emission at 405 nm upon
excitation at 295 nm (ε ) 0.87 × 104 M-1 cm-1, Φ0 ) 0.057)
in buffer solution because of the efficient PET quenching
from the DPA moiety to the quinoline fluorophore. Remarkable
fluorescence enhancements were detected upon the
addition of Zn2+ and Cd2+, respectively. Upon binding Zn2+,
QB showed a larger emission red-shift of 53 nm from 405
to 458 nm with an isoemissive point at 400 nm (Figure 1a),
indicating that a promoted ICT process occurred with
consequent ratiometric fluorescent signals. The ratio of
emission intensities (F458 nm/F380 nm) varies from 0.6 to 12
and is saturated up to a molar ratio (QB/Zn2+) of 1:1 (Figure
1b). In contrast, upon binding Cd2+, only enhanced fluorescent
intensity (ΦCd ) 0.22) with a smaller wavelength shift
(20 nm), but without an isoemissive point, were observed
(Figure 1c), suggesting that sensor QB recognizes Cd2+
principally based on the CHEF mechanism. The titration
curves as shown in Figure 1b,d demonstrate the high binding
affinities12 and 1:1 complexes between Zn2+, Cd2+, and QB.
To obtain an insight into the sensing properties of QB
toward metal ions, we investigated the fluorescence titration
of different ions in CH3CN/H2O buffer solution (Figure 2).
Quenching effects were observed when heavy metal ions of
Co2+, Ni2+, Cu2+, Hg2+, and Pb2+ were added, as observed
in other quinoline-DPA-based sensors. Addition of Mg2+,
Ca2+, and Na+ exerted no or little effect on the emission of
QB, even at high concentration (1 mM). As expected,
remarkable fluorescence changes were detected upon the
addition of either Zn2+ or Cd2+. The Zn2+-selective ratiometric
response (F458nm/F380nm up to 12) of QB was clearly
observed (Figure 2b) and was not interfered by the presence
of Mn2+, Fe3+, Mg2+, Ca2+, K+, and Na+ (Figures S4 and
S5, Supporting Information). Considering the distinct fluorescent
enhancement upon binding Cd2+, QB can also be
used as a CHEF Cd2+-selective sensor. In this case, other
metals behave similarly as in the case of Zn2+ (Figure S3,
Supporting Information). These results suggest that QB had
good selectivity for Zn2+ and Cd2+

麻烦翻译下Figure 1 displays the emission spectraFigure 1 displays the emission spectra changes of QB uponthe addition of an increasing amount of Zn2+ and Cd2+. FreeQB showed weak fluorescence emission at 405 nm uponexcitation at 295 nm (ε ) 0.8
图1示出了QB在添加数量逐渐增加的Zn2+和Cd2+时发射谱的变化.自由QB在于缓冲溶液中在295nm（ε＝0.87×104 M－1cm－1,Φ0＝0.057）下激励时,在405nm处显示出弱的荧光发射,因为从DPA分子部分到喹啉荧光团有效地PET猝灭.在添加Zn2+和Cd2+时,分别检测到明显的荧光增强.在结合Zn2+时,QB显示出53nm的较大红色偏移,从405到458nm,在400nm处有一个等发射点（图1a）,表明了由作为结果发生的比率荧光信号产生了得到促进的ICT过程.发射光强的比率（F458nm/F380nm）从0.6变到12,直至1：1的摩尔比（QB/Zn2＋）时饱和.与此相反,在结合Cd2+时,只观察到伴随较小波长偏移的增强的荧光光强（Φcd＝0.22）,而没有等发射点（图1c）,表明了传感器QB主要根据CHEF机理识别Cd2＋.如图1b、d所示的滴定曲线证明了高的结合亲和力12和Zn2+、Cd2+和QB之间1：1的络合物.
为了进一步了解QB对金属离子的传感性质,我们研究了CH3CN/H2O缓冲溶液中不同离子的荧光滴定（图2）.当添加Co2＋、Ni2＋、Cu2＋、Hg2＋、和Pb2＋等重金属离子时观察到
了猝灭效应,就像在其他喹啉—DPA基传感器上观察到的那样.添加Mg2＋、Ca2＋和Na＋对QB的发射不施加或几乎不施加影响,即使在高浓度（1mM）下也是如此.如预料的那样,在添加Zn2＋和Cd2＋时,都能检测到明显的荧光变化.QB对Zn2＋的选择性比率响应（F458nm/F380nm直至12）被清楚地观察到（图2b）,而且不受存在Mn2＋、Fe3＋、Mg2＋、Ca2＋、K＋和Na＋等离子的干扰（支持信息图S4和S5）.考虑在结合Cd2＋时明显的荧光增强,QB也可以用作CHEF Cd2＋选择性传感器.在这种情况下,其他金属的性状类似于在Zn2＋的情况下（支持信息图S3）.这些结果告诉我们,QB对Zn2＋和Cd2＋有良好的选择性.

how long it is.

图1显示了血流量的变化后，发射光谱
一个越来越多的锌除了+和Cd2 +。自由的
血流量显示，在405纳米时弱荧光
激发波长在295（ε）0.87 × 104米- 1 cm - 1处，Φ0）0.057）
在缓冲区，因为高效率的解决方案聚酯淬火
从政治部基团对喹啉荧光。显着
荧光检测改进后
此外对Zn2 +和Cd2 +分别。锌离子结...

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图1显示了血流量的变化后，发射光谱
一个越来越多的锌除了+和Cd2 +。自由的
血流量显示，在405纳米时弱荧光
激发波长在295（ε）0.87 × 104米- 1 cm - 1处，Φ0）0.057）
在缓冲区，因为高效率的解决方案聚酯淬火
从政治部基团对喹啉荧光。显着
荧光检测改进后
此外对Zn2 +和Cd2 +分别。锌离子结合后，
血流量出现较大的排放红色的53纳米转移至405
至458纳米与400纳米isoemissive点（图1a），
表明一个促进信息和通信技术的过程中发生的
随后比例荧光信号。的比率
排放强度（F458 nm/F380纳米）不同从0.6至12
和饱和可达摩尔比（QB/Zn2 +）1:1（图
1b中）。相反，Cd2 +的结合后，不仅提高了荧光
强度（ΦCd）0.22），以较小的波长变化
（20纳米），但没有一个isoemissive点，观察
（图1c），这表明传感器识别Cd2 +的血流量
主要依据主厨机制。在滴定
曲线如图1b中，Ḏ显示高约束力
affinities12和1:1之间的配合+锌，镉，和QB。
要获取到qb则传感特性，成为名符其实
对金属离子，我们调查的荧光滴定
在CH3CN/H2O缓冲溶液中不同离子（图2）。
淬火效果观察到的重金属离子
钴，镍+，Cu2 +和Hg2 +和Pb2 +的增加了，因为观察
其他喹啉政治部的传感器。镁离子加成+，
钙离子和钠离子没有或很少产生影响的排放
的QB，即使在高浓度（1毫米）。正如所料，
显着荧光的变化后发现
另外一方锌+或Cd2 +的。在锌离子选择性比例
回应（F458nm/F380nm高达12）的血流量明显
观察（图2b），并没有干预的存在
中Mn2 +，Fe3 +离子，镁，钙，钾和钠离子（图S4和
五，支持信息）。考虑到不同的荧光
镉结合后增强+，血流量也可以
作为一名厨师，Cd2 +的选择性传感器。在这种情况下，其他
金属类似的行动在案件的锌+（图三，
支持信息）。这些结果表明，血流量有
选择性好，对Zn2 +和Cd2 +

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Figure 1 displays the emission spectra changes of QB upon
the addition of an increasing amount of Zn2+ and Cd2+. Free
QB showed weak fluorescence emission at 405 nm upon
excitation at 295 ...

全部展开

Figure 1 displays the emission spectra changes of QB upon
the addition of an increasing amount of Zn2+ and Cd2+. Free
QB showed weak fluorescence emission at 405 nm upon
excitation at 295 nm (ε ) 0.87 × 104 M-1 cm-1, Φ0 ) 0.057)
in buffer solution because of the efficient PET quenching
from the DPA moiety to the quinoline fluorophore. Remarkable
fluorescence enhancements were detected upon the
addition of Zn2+ and Cd2+, respectively. Upon binding Zn2+,
QB showed a larger emission red-shift of 53 nm from 405
to 458 nm with an isoemissive point at 400 nm (Figure 1a),
indicating that a promoted ICT process occurred with
consequent ratiometric fluorescent signals. The ratio of
emission intensities (F458 nm/F380 nm) varies from 0.6 to 12
and is saturated up to a molar ratio (QB/Zn2+) of 1:1 (Figure
1b). In contrast, upon binding Cd2+, only enhanced fluorescent
intensity (ΦCd ) 0.22) with a smaller wavelength shift
(20 nm), but without an isoemissive point, were observed
(Figure 1c), suggesting that sensor QB recognizes Cd2+
principally based on the CHEF mechanism. The titration
curves as shown in Figure 1b,d demonstrate the high binding
affinities12 and 1:1 complexes between Zn2+, Cd2+, and QB.
To obtain an insight into the sensing properties of QB
toward metal ions, we investigated the fluorescence titration
of different ions in CH3CN/H2O buffer solution (Figure 2).
Quenching effects were observed when heavy metal ions of
Co2+, Ni2+, Cu2+, Hg2+, and Pb2+ were added, as observed
in other quinoline-DPA-based sensors. Addition of Mg2+,
Ca2+, and Na+ exerted no or little effect on the emission of
QB, even at high concentration (1 mM). As expected,
remarkable fluorescence changes were detected upon the
addition of either Zn2+ or Cd2+. The Zn2+-selective ratiometric
response (F458nm/F380nm up to 12) of QB was clearly
observed (Figure 2b) and was not interfered by the presence
of Mn2+, Fe3+, Mg2+, Ca2+, K+, and Na+ (Figures S4 and
S5, Supporting Information). Considering the distinct fluorescent
enhancement upon binding Cd2+, QB can also be
used as a CHEF Cd2+-selective sensor. In this case, other
metals behave similarly as in the case of Zn2+ (Figure S3,
Supporting Information). These results suggest that QB had
good selectivity for Zn2+ and Cd2+
图1显示了血流量的变化后，发射光谱
一个越来越多的自由的锌除了+和Cd2 +。
血流量显示，在405纳米时弱荧光
激发波长在295（ε）0.87 × 104米- 1 cm - 1处，Φ0）0.057）
在缓冲区，因为高效率的解决方案聚酯淬火
从政治部基团对喹啉荧光。显着
荧光检测改进后
此外对Zn2 +和Cd2 +分别。锌离子结合后，
血流量出现较大的排放红色的53纳米转移至405
至458纳米与400纳米isoemissive点（图1a），
表明一个促进信息和通信技术的过程中发生的
随后比例荧光信号。的比率
排放强度（F458 nm/F380纳米）不同从0.6至12
和饱和可达摩尔比（QB/Zn2 +）1:1（图
1b中）。相反，Cd2 +的结合后，不仅提高了荧光
强度（ΦCd）0.22），以较小的波长变化
（20纳米），但没有一个isoemissive点，观察
（图1c），这表明传感器识别Cd2 +的血流量
主要依据主厨机制。在滴定
曲线如图1b中，Ḏ显示高约束力
affinities12和1:1之间的配合+锌，镉，和QB。
要获取到qb则传感特性，成为名符其实
对金属离子，我们调查的荧光滴定
在CH3CN/H2O缓冲溶液中不同离子（图2）。
淬火效果观察到的重金属离子
钴，镍+，Cu2 +和Hg2 +和Pb2 +的增加了，因为观察
其他喹啉政治部的传感器。镁离子加成+，
钙离子和钠离子没有或很少产生影响的排放
的QB，即使在高浓度（1毫米）。正如所料，
显着荧光的变化后发现
另外一方锌+或Cd2 +的。在锌离子选择性比例
回应（F458nm/F380nm高达12）的血流量明显
观察（图2b），并没有干预的存在
中Mn2 +，Fe3 +离子，镁，钙，钾和钠离子（图S4和
五，支持信息）。考虑到不同的荧光
镉结合后增强+，血流量也可以
作为一名厨师，Cd2 +的选择性传感器。在这种情况下，其他
金属类似的行动在案件的锌+（图三，
支持信息）。这些结果表明，血流量有
选择性好，对Zn2 +和Cd2 +

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