1
|
Yang Y, Chen P, Liu Y, Cai Z, Wang X, Me Y, Ding X, Lin L, Jiang H, Zhang Z, Ju Y. A colorimetric indicator-displacement assay based on stable Cu 2+ selective carbon dots for fluorescence turn-on detection of pyrophosphate anions in urine. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 251:119479. [PMID: 33503563 DOI: 10.1016/j.saa.2021.119479] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 01/01/2021] [Accepted: 01/10/2021] [Indexed: 06/12/2023]
Abstract
Determination of PPi levels in urine represents a measurable factor for diagnostic, treatment, and monitoring of urolithiasis. Owing to the quenching ability of Cu2+ on fluorescent carbon dots (CDs) and strong binding affinity between Cu2+ and PPi, we develop a new off-on assay for PPi detection using newly BPHA CDs (BPHA: N,N-bis(pyridin-2-ylmethyl)hexan-1-amine). The fluorescence intensity of BPHA CDs was significantly quenched by Cu2+ ("off") through forming BPHA CDs/Cu2+ complexes and the fluorescence intensity of BPHA CDs /Cu2+ system was completely resumed by PPi ("on") owing to the release of free Cu2+. The fluorescence turn-off/on approach showed a highly selective response to PPi over the large family of other anions. The detection limits were 0.094 μM for Cu2+ and 0.025 μM for PPi, respectively. A wide linear range for PPi was up to 4400 μM. The indicator displacement assay (IDAs) using pyrocatechol violet (PV) as a colorimetric indicator was carried out to detect PPi with the naked eyes. The "off-on" fluorescent sensor based on BPHA CDs shows many merits, including convenient operation, cost-saving, high sensitivity, selectivity, stability and wide detecting range, which is applied to PPi detection in human urine sample.
Collapse
Affiliation(s)
- Yi Yang
- Changzhou Vocational Institute of Engineering, Changzhou 213164, China
| | - Pei Chen
- School of Pharmacy, Nanjing Medical University, Nanjing 211166, China; West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Yuqing Liu
- School of Basic Medical Sciences, Nanjing Medical University, Nanjing 211166, China; School of Medicine, Xiamen University, Xiamen 361005, China
| | - Zheng Cai
- School of Pharmacy, Nanjing Medical University, Nanjing 211166, China
| | - Xiyao Wang
- School of Pharmacy, Nanjing Medical University, Nanjing 211166, China
| | - Yang Me
- The First affiliated Hospital, Nanjing Medical University, Nanjing 211166, China
| | - Xiongyu Ding
- The First affiliated Hospital, Nanjing Medical University, Nanjing 211166, China
| | - Lan Lin
- School of Pharmacy, Nanjing Medical University, Nanjing 211166, China
| | - Huijun Jiang
- School of Pharmacy, Nanjing Medical University, Nanjing 211166, China
| | - Zhenqin Zhang
- School of Pharmacy, Nanjing Medical University, Nanjing 211166, China
| | - Yichun Ju
- School of Pharmacy, Nanjing Medical University, Nanjing 211166, China.
| |
Collapse
|
2
|
Solution and Solid State Studies of Urea Derivatives of DITIPIRAM Acting as Powerful Anion Receptors. Molecules 2021; 26:molecules26061788. [PMID: 33810117 PMCID: PMC8004752 DOI: 10.3390/molecules26061788] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 03/18/2021] [Accepted: 03/19/2021] [Indexed: 11/17/2022] Open
Abstract
Herein, we present the synthesis and anion binding studies of a family of homologous molecular receptors 4–7 based on a DITIPIRAM (8-propyldithieno-[3,2-b:2′,3′-e]-pyridine-3,5-di-amine) platform decorated with various urea para-phenyl substituents (NO2, F, CF3, and Me). Solution, X-ray, and DFT studies reveal that the presented host–guest system offers a convergent array of four urea NH hydrogen bond donors to anions allowing the formation of remarkably stable complexes with carboxylates (acetate, benzoate) and chloride anions in solution, even in competitive solvent mixtures such as DMSO-d6/H2O 99.5/0.5 (v/v) and DMSO-d3/MeOH-d3 9:1 (v/v). The most effective derivatives among the series turned out to be receptors 5 and 6 containing electron-withdrawing F- and -CF3para-substituents, respectively.
Collapse
|
3
|
Wang S, Gong L, El Fakhri G, Wang J. Efficient synthesis of 6,6′-diamido-2,2′-dipicolylamine ligands for potential phosphate anion sensing. NEW J CHEM 2021; 45:16833-16840. [DOI: 10.1039/d1nj03030b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Through retrosynthetic analysis, functionalized 6,6′-diamido-2,2′-dipicolylamines (DA-DPAs) have been efficiently synthesized, which may accelerate the development of selective probes towards phosphate anions.
Collapse
Affiliation(s)
- Shuai Wang
- Gordon Center for Medical Imaging, Massachusetts General Hospital and Harvard Medical School, 125 Nashua Street, Suite 660, Boston, Massachusetts 02114, USA
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Lichong Gong
- Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School, 149 Thirteenth Street, Suite 2301, Charlestown, Massachusetts 02129, USA
| | - Georges El Fakhri
- Gordon Center for Medical Imaging, Massachusetts General Hospital and Harvard Medical School, 125 Nashua Street, Suite 660, Boston, Massachusetts 02114, USA
| | - Junfeng Wang
- Gordon Center for Medical Imaging, Massachusetts General Hospital and Harvard Medical School, 125 Nashua Street, Suite 660, Boston, Massachusetts 02114, USA
| |
Collapse
|