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1

Huang, Xian Nan, Wei Li, and Wei He. "pH Tunable Turn on and Turn off Quantum Dots Conjugated with Poly(2-(Dialkylamino)ethyl Methacrylate)." Advanced Materials Research 998-999 (July 2014): 75–78. http://dx.doi.org/10.4028/www.scientific.net/amr.998-999.75.

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A novel pH sensitive cadmium sulfide quantum dot (CdS QD) was prepared by a coprecipitation method in the presence of pH sensitive poly (2-(dimethylamino) ethyl methacrylate)-co-poly (2-(dibutylamino) ethyl methacrylate)(PDMA-PDBA) copolymer. CdCl2and Na2S were mixed in aqueous media in the presence of PDMA-PDBA. The amine groups of PDMA were anchored on the surface of the formed CdS nanoparticles, whereas the PDBA segment was anchored on the surface to form a hydrophilic palisade at low pH environment, thus turn on the fluorescence CdS QD probe; at high pH value, PDBA segments precipitate and turn off fluorescence because of the phase separation. This novel pH sensitive fluorescene CdS QDs probe have great application potential for target imaging of cancer.
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2

Baldridge, Anthony, Adrian Amador, and Laren M. Tolbert. "Fluorescence Turn On by Cholate Aggregates." Langmuir 27, no. 7 (2011): 3271–74. http://dx.doi.org/10.1021/la2003244.

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3

Takei, F., and K. Nakatani. "Fluorescence turn-on hairpin-probe PCR." Chemical Communications 53, no. 8 (2017): 1393–96. http://dx.doi.org/10.1039/c6cc08947j.

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A new fluorescence turn-on type of PCR monitoring system (Hpro-PCR) using a hairpin probe and a primer having a tag sequence at the 5′ end with the fluorescent molecule 2,7-diamino-1,8-naphthyridine derivative (DANP) has been developed.
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4

Kim, Hyun Jung, Sankarprasad Bhuniya, Rakesh Kumar Mahajan, et al. "Fluorescence turn-on sensors for HSO4−." Chemical Communications, no. 46 (2009): 7128. http://dx.doi.org/10.1039/b918324h.

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5

Si, Zhongzhou, Yining Li, Hu Quan, Haizhi Qi, Ting Li, and Minghui Yang. "ELISA type fluorescence turn-on immunoassay based on Fe3+ induced fluorescence enhancement." Sensors and Actuators B: Chemical 202 (October 2014): 663–66. http://dx.doi.org/10.1016/j.snb.2014.05.131.

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6

Chen, Bin, Xi Sun, Xin Li, Hans Ågren, and Yongshu Xie. "TICT based fluorescence “turn-on” hydrazine probes." Sensors and Actuators B: Chemical 199 (August 2014): 93–100. http://dx.doi.org/10.1016/j.snb.2014.03.087.

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7

Germain, Meaghan E., and Michael J. Knapp. "Turn-on Fluorescence Detection of H2O2and TATP." Inorganic Chemistry 47, no. 21 (2008): 9748–50. http://dx.doi.org/10.1021/ic801317x.

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8

Conner, Joshua W. "Fluorogens: Generating Receptor-Specific Turn-On Fluorescence." Australian Journal of Chemistry 71, no. 3 (2018): 197. http://dx.doi.org/10.1071/ch17492.

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9

Sushil, Ranjan Bhatta, Bhattacharya Sudipa, Goswami Bappaditya, and Thakur Arunabha. "Triazole based 8-formyl coumarin-glycine conjugate: A specific turn-on fluorescent probe for CuII ion." Journal of India Chemical Society Vol. 95, Dec 2018 (2018): 1517–24. https://doi.org/10.5281/zenodo.5644632.

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Department of Chemistry, Jadavpur University, Kolkata-700 032, India E-mail: arunabha.thakur@jadavpuruniversity.in Department of Chemical Science, Indian Institute of Science Education and Research Kolkata, Mohanpur-741 246, West Bengal, India E-mail: babuiitm07@gmail.com <em>Manuscript received online 18 October 2018, accepted 12 November 2018</em> We have synthesized a new triazole based 8-formyl coumarin-glycine conjugate, (1), which displays turn-on fluorescent signal in presence of Cu<sup>2+</sup> ion. The resulting complex displayed high selectivity towards C<sup>u2+</sup> ion not only via fluorescence emission but also exhibited a drastic color change from colorless to light green, which signifies the naked eye detection of Cu<sup>2+</sup> ion. Other metal ions, e.g. Cd<sup>2+</sup>, C<sub>o2+</sub>, Fe<sup>2+</sup>, Fe<sup>3+</sup>, Hg<sup>2+</sup>, Mg<sup>2+</sup>, Mn<sup>2+</sup>, Ni<sup>2+</sup>, P<sup>b2</sup>+ and Zn<sup>2+</sup> produced no obvious changes in colorimetric experiment as well as in the fluorescence emission spectra. The binding constant (2.88&times;10<sup>4</sup> M<sup>&ndash;1</sup>) and ligand-metal binding ratio (1:1) were determined from fluorescence spectral data and Job&rsquo;s plot analysis respectively. The detection limit for the present probe towards CuII ion was calculated as low as 78 nM. Furthermore, on the basis of the <sup>1</sup>H NMR titration, HRMS and DFT study, probable binding mode of 1 with Cu<sup>2+</sup> has been proposed.
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10

Song, Dayoung, Jung Mi Lim, Somin Cho, et al. "A fluorescence turn-on H2O2 probe exhibits lysosome-localized fluorescence signals." Chemical Communications 48, no. 44 (2012): 5449. http://dx.doi.org/10.1039/c2cc31632c.

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11

Mandal, Paulami, Dibakar Sahoo, Priyatosh Sarkar, Kaushik Chakraborty, and Sukhen Das. "Fluorescence turn-on and turn-off sensing of pesticides by carbon dot-based sensor." New Journal of Chemistry 43, no. 30 (2019): 12137–51. http://dx.doi.org/10.1039/c9nj03192h.

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12

Seo, Sungbaek, Min Sang Kwon, Andrew W. Phillips, Deokwon Seo, and Jinsang Kim. "Highly sensitive turn-on biosensors by regulating fluorescent dye assembly on liposome surfaces." Chemical Communications 51, no. 50 (2015): 10229–32. http://dx.doi.org/10.1039/c5cc01621e.

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Herein, we developed a turn-on type liposome-based sensing platform by assembling fluorescence dyes to form H-type aggregation with emission quenching on phospholipid-liposome surfaces. Rationally devised specific interactions between the phospholipid and a target analyte effectively release the fluorescence dyes from H-aggregate, producing a turn-on signal.
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13

Ko, Kyoung Chul, Jia-Sheng Wu, Hyun Jung Kim, et al. "Rationally designed fluorescence ‘turn-on’ sensor for Cu2+." Chemical Communications 47, no. 11 (2011): 3165. http://dx.doi.org/10.1039/c0cc05421f.

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14

Lim, Soo-Yeon, Sanghee Lee, Seung Bum Park, and Hae-Jo Kim. "Highly selective fluorescence turn-on probe for glutathione." Tetrahedron Letters 52, no. 30 (2011): 3902–4. http://dx.doi.org/10.1016/j.tetlet.2011.05.086.

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15

Borse, Vivek, Paridhi Jain, Mayur Sadawana, and Rohit Srivastava. "‘Turn-on’ fluorescence assay for inorganic phosphate sensing." Sensors and Actuators B: Chemical 225 (March 2016): 340–47. http://dx.doi.org/10.1016/j.snb.2015.11.054.

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16

Lan, Haichuang, Bin Liu, Guanglei Lv, et al. "Dual-channel fluorescence “turn on” probe for Cu2+." Sensors and Actuators B: Chemical 173 (October 2012): 811–16. http://dx.doi.org/10.1016/j.snb.2012.07.102.

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17

Shirinfar, Bahareh, Humaira Seema, and Nisar Ahmed. "Charged probes: turn-on selective fluorescence for RNA." Organic & Biomolecular Chemistry 16, no. 2 (2018): 164–68. http://dx.doi.org/10.1039/c7ob02423a.

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18

Zhang, T., H. Fan, S. Lv, and Q. Jin. "Polyelectrolytes: Fluorescence Turn-On Sensors in Aqueous Media." Synfacts 2011, no. 02 (2011): 0152. http://dx.doi.org/10.1055/s-0030-1259249.

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19

He, Wen-Ying, Ning Liu, Xu Jiang, Yan-Zhen Zheng, Zhi-Wei Lin, and Jiang-Shan Shen. "Reaction-based fluorescence probes for “turn on” sensing fluoride ions." Organic & Biomolecular Chemistry 20, no. 6 (2022): 1191–95. http://dx.doi.org/10.1039/d1ob02324a.

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20

Qiu, Yan, Jianlin Huang, and Li Jia. "A Turn-On Fluorescent Sensor for Glutathione Based on Bovine Serum Albumin-Stabilized Gold Nanoclusters." International Journal of Analytical Chemistry 2018 (December 2, 2018): 1–5. http://dx.doi.org/10.1155/2018/1979684.

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A fluorescence sensor for the detection of glutathione based on the fluorescence recovering of the bovine serum albumin-stabilized gold nanoclusters is reported. This study indicates that glutathione restores the copper-ion-quenched fluorescence by coordinating the bound copper ion in the bovine serum albumin molecule used for stabilizing the gold nanocluster through its sulfydryl. Under the experimental conditions, the fluorescence response showed a linear relationship with the concentration of glutathione over the range from 10 µM to 400 µM. The fluorescence sensor successfully detected glutathione in commercial drug products.
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21

Chen, Chuanxia, Jiahui Zhao, Yizhong Lu, Jian Sun, and Xiurong Yang. "Fluorescence Immunoassay Based on the Phosphate-Triggered Fluorescence Turn-on Detection of Alkaline Phosphatase." Analytical Chemistry 90, no. 5 (2018): 3505–11. http://dx.doi.org/10.1021/acs.analchem.7b05325.

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22

Kong, Liyan, Jiaming Zhu, Wen Wang, et al. "Highly sensitive turn-on fluorescence detection of thrombomodulin based on fluorescence resonance energy transfer." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 173 (February 2017): 675–80. http://dx.doi.org/10.1016/j.saa.2016.10.022.

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23

Spenst, Peter, and Frank Würthner. "A Perylene Bisimide Cyclophane as a “Turn-On” and “Turn-Off” Fluorescence Probe." Angewandte Chemie International Edition 54, no. 35 (2015): 10165–68. http://dx.doi.org/10.1002/anie.201503542.

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24

Spenst, Peter, and Frank Würthner. "A Perylene Bisimide Cyclophane as a “Turn-On” and “Turn-Off” Fluorescence Probe." Angewandte Chemie 127, no. 35 (2015): 10303–6. http://dx.doi.org/10.1002/ange.201503542.

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25

Dwivedi, Atul Kumar, and Parameswar Krishnan Iyer. "A fluorescence turn on trypsin assay based on aqueous polyfluorene." Journal of Materials Chemistry B 1, no. 32 (2013): 4005. http://dx.doi.org/10.1039/c3tb20712a.

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26

Zhong, Zhimin, Dongdong Zhang, Dongmei Li, Gengxiu Zheng, and Zhongzhen Tian. "Turn-on fluorescence sensor based on naphthalene anhydride for Hg2+." Tetrahedron 72, no. 49 (2016): 8050–54. http://dx.doi.org/10.1016/j.tet.2016.10.033.

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27

Nedeljko, Polonca, Matejka Turel, and Aleksandra Lobnik. "Turn-On Fluorescence Detection of Glutathione Based on o-Phthaldialdehyde-Assisted SiO2 Particles." Journal of Sensors 2018 (November 15, 2018): 1–9. http://dx.doi.org/10.1155/2018/1692702.

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We report about the fluorometric method for the determination of glutathione (GSH) in dietary supplements. The fluorometric assay is based on the use of functionalized silica particles (SiO2-SH) in combination with o-phthaldialdehyde (OPA). The fluorescence excitation and emission wavelengths were located at 340 nm and 430 nm. The relative fluorescence intensity was linear in the concentration range between 1.0 × 10−7 mol/L and 1.0 × 10−5 mol/L (M) with the detection limit of 3.4 × 10−7 M. The fluorescent silica particle-based sensor was successfully employed for the determination of GSH in dietary supplements with excellent recoveries. The proposed sensor may pave a new way for fluorescence sensing of other substances in food samples.
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28

Kim, Jun-Woo, Su-Mi Lee, and Jong-Man Kim. "Photoinduced Fluorescence "Turn-On" Micropatterning with Substituted Triphenylmethane Derivatives." Bulletin of the Korean Chemical Society 31, no. 10 (2010): 2753–54. http://dx.doi.org/10.5012/bkcs.2010.31.10.2753.

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29

Pinto, Miguel N., Indranil Chakraborty, Wiley Schultz-Simonton, Mauricio Rojas-Andrade, Rebecca Braslau, and Pradip K. Mascharak. "Tracking silver delivery to bacteria using turn-on fluorescence." Chemical Communications 53, no. 9 (2017): 1459–62. http://dx.doi.org/10.1039/c6cc07463d.

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The reaction with cellular chloride and proteins releases the fluorescent ligand qBODIPY of the designed silver(i) complex [Ag(qBODIPY)(CF<sub>3</sub>SO<sub>3</sub>)] inside bacteria like P. aeruginosa and allows an easy tracking of the silver delivery by the emergence of strong green fluorescence.
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30

Morimoto, Masakazu, Ryota Kashihara, Katsuya Mutoh, et al. "Turn-on mode fluorescence photoswitching of diarylethene single crystals." CrystEngComm 18, no. 38 (2016): 7241–48. http://dx.doi.org/10.1039/c6ce00725b.

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31

Sui, Binglin, Bosung Kim, Yuanwei Zhang, Andrew Frazer, and Kevin D. Belfield. "Highly Selective Fluorescence Turn-On Sensor for Fluoride Detection." ACS Applied Materials & Interfaces 5, no. 8 (2013): 2920–23. http://dx.doi.org/10.1021/am400588w.

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32

Thooft, Andrea Marie, Kyle Cassaidy, and Brett VanVeller. "A Small Push–Pull Fluorophore for Turn-on Fluorescence." Journal of Organic Chemistry 82, no. 17 (2017): 8842–47. http://dx.doi.org/10.1021/acs.joc.7b00939.

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33

Kar, Chirantan, and Gopal Das. "A retrievable fluorescence “TURN ON” sensor for sulfide anions." Journal of Photochemistry and Photobiology A: Chemistry 251 (January 2013): 128–33. http://dx.doi.org/10.1016/j.jphotochem.2012.10.024.

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34

Morimoto, Masakazu, Yuta Takagi, Karina Hioki, et al. "A turn-on mode fluorescent diarylethene: Solvatochromism of fluorescence." Dyes and Pigments 153 (June 2018): 144–49. http://dx.doi.org/10.1016/j.dyepig.2018.02.016.

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35

Kim, Beomsue, Masahiro Fukuda, Jung‐Yeol Lee, et al. "Visualizing Microglia with a Fluorescence Turn‐On Ugt1a7c Substrate." Angewandte Chemie International Edition 58, no. 24 (2019): 7972–76. http://dx.doi.org/10.1002/anie.201903058.

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36

Geng, Wen-Chao, Shaorui Jia, Zhe Zheng, Zhihao Li, Dan Ding, and Dong-Sheng Guo. "A Noncovalent Fluorescence Turn-on Strategy for Hypoxia Imaging." Angewandte Chemie 131, no. 8 (2019): 2399–403. http://dx.doi.org/10.1002/ange.201813397.

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37

Kim, Beomsue, Masahiro Fukuda, Jung‐Yeol Lee, et al. "Visualizing Microglia with a Fluorescence Turn‐On Ugt1a7c Substrate." Angewandte Chemie 131, no. 24 (2019): 8056–60. http://dx.doi.org/10.1002/ange.201903058.

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38

Geng, Wen‐Chao, Shaorui Jia, Zhe Zheng, Zhihao Li, Dan Ding, and Dong‐Sheng Guo. "A Noncovalent Fluorescence Turn‐on Strategy for Hypoxia Imaging." Angewandte Chemie International Edition 58, no. 8 (2019): 2377–81. http://dx.doi.org/10.1002/anie.201813397.

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39

Zhang, Chaowei, Dandan Wang, Yiduo Chen, et al. "Highly selective fluorescence turn-on sensor for·thiol compounds detection." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 320 (November 2024): 124667. http://dx.doi.org/10.1016/j.saa.2024.124667.

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40

Tang, Ying-Jie, Wen-Le Fang, Kui Ren, Xiao-Feng Guo, and Hong Wang. "A turn-on homodimer fluorescent probe based on homo-FRET for the sensing of biothiols in lysosome: a trial of a new turn-on strategy." Analyst 146, no. 9 (2021): 2974–82. http://dx.doi.org/10.1039/d1an00161b.

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41

Zeng, X., C. Wang, Y. X. Li, et al. "Label-free aptasensor for adenosine deaminase sensing based on fluorescence turn-on." Analyst 140, no. 4 (2015): 1192–97. http://dx.doi.org/10.1039/c4an01963f.

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42

Aragay, Gemma, Georgina Alarcón, Josefina Pons, Mercè Font-Bardía, and Arben Merkoçi. "Medium Dependent Dual Turn-On/Turn-Off Fluorescence System for Heavy Metal Ions Sensing." Journal of Physical Chemistry C 116, no. 2 (2012): 1987–94. http://dx.doi.org/10.1021/jp210687v.

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43

Liew, Si Si, Shubo Du, Jingyan Ge, et al. "A chemoselective cleavable fluorescence turn-ON linker for proteomic studies." Chemical Communications 53, no. 100 (2017): 13332–35. http://dx.doi.org/10.1039/c7cc08235e.

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44

Li, Yuxia, Zeting Meng, Yating Liu, and Baozhu Zhang. "Turn-on fluorescent nanoprobe for ATP detection based on DNA-templated silver nanoclusters." RSC Advances 14, no. 8 (2024): 5594–99. http://dx.doi.org/10.1039/d3ra07077h.

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A novel turn-on fluorescent nanoprobe was constructed based on the alteration of the aptamer conformation induced by target recognition and turn-on fluorescence due to alteration of its environment of DNA-templated silver nanoclusters (DNA-AgNCs).
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45

Li, Na, Yu Die Zhu, Ting Liu, et al. "Turn-on fluorescence detection of pyrophosphate anion based on DNA-attached cobalt oxyhydroxide." New Journal of Chemistry 41, no. 5 (2017): 1993–96. http://dx.doi.org/10.1039/c6nj03491h.

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46

Joshi, Ritika, Oinam Romesh Meitei, Manojkumar Jadhao, Himank Kumar, and Sujit Kumar Ghosh. "Conformation controlled turn on–turn off phosphorescence in a metal-free biluminophore: thriving the paradox that exists for organic compounds." Physical Chemistry Chemical Physics 18, no. 40 (2016): 27910–20. http://dx.doi.org/10.1039/c6cp04336d.

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47

Kong, Rong-Mei, Ni-Na Sun, Fengli Qu, Haiyan Wu, Hua Wang, and Jinmao You. "Sensitive fluorescence “turn-on” detection of bleomycin based on a superquenched perylene–DNA complex." RSC Advances 5, no. 106 (2015): 86849–54. http://dx.doi.org/10.1039/c5ra18227a.

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48

Wang, Ke-Rang, Hong-Wei An, Rui-Xue Rong, Zhi-Ran Cao, and Xiao-Liu Li. "Fluorescence turn-on sensing of protein based on mannose functionalized perylene bisimides and its fluorescence imaging." Biosensors and Bioelectronics 58 (August 2014): 27–32. http://dx.doi.org/10.1016/j.bios.2014.02.038.

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49

Shen, Xin, Lei Xu, Wanying Zhu, Bingzhi Li, Junli Hong, and Xuemin Zhou. "A turn-on fluorescence aptasensor based on carbon dots for sensitive detection of adenosine." New Journal of Chemistry 41, no. 17 (2017): 9230–35. http://dx.doi.org/10.1039/c7nj02384g.

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50

Chen, Jiaojiao, Xinyao Huang, Hui Tang, Hongyu Guo, and Fafu Yang. "“Turn-on” fluorescence sensor for vitamin B1 based on cyanostilbene macrocycle." Dyes and Pigments 207 (November 2022): 110705. http://dx.doi.org/10.1016/j.dyepig.2022.110705.

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