Evidence map›Paper›PMID 40142020›Full record

ArticleMolecules (Basel, Switzerland)2025

Optimized Sensitivity in Copper(II) Ion Detection: Sustainable Fabrication of Fluorescence Red-Shifted Graphene Quantum Dots via Electron-Withdrawing Modulation.

Weitao Li, Qian Niu, Xinglong Pang, Shang Li, Yang Liu, Boyu Li, Shuangyan Li, Lei Wang, Huazhang Guo, Liang Wang

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Molecules (Basel, Switzerland), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors.

Weitao LiTextile and Garment Industry of Research Institute, Zhongyuan University of Technology, Zhengzhou 450007, China.ORCID 0000-0002-2738-007X
Qian NiuTextile and Garment Industry of Research Institute, Zhongyuan University of Technology, Zhengzhou 450007, China.
Xinglong PangInstitute of Nanochemistry and Nanobiology, School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, China.ORCID 0009-0000-2401-6478
Shang LiTextile and Garment Industry of Research Institute, Zhongyuan University of Technology, Zhengzhou 450007, China.
Yang LiuTextile and Garment Industry of Research Institute, Zhongyuan University of Technology, Zhengzhou 450007, China.
Boyu LiTextile and Garment Industry of Research Institute, Zhongyuan University of Technology, Zhengzhou 450007, China.
Shuangyan LiTextile and Garment Industry of Research Institute, Zhongyuan University of Technology, Zhengzhou 450007, China.
Lei WangTextile and Garment Industry of Research Institute, Zhongyuan University of Technology, Zhengzhou 450007, China.
Huazhang GuoInstitute of Nanochemistry and Nanobiology, School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, China.ORCID 0000-0001-8232-8031
Liang WangInstitute of Nanochemistry and Nanobiology, School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, China.ORCID 0000-0002-3771-4627

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Graphene quantum dots (GQDs) represent a class of promising nanomaterials characterized by adjustable optical properties, making them well suited for applications in biosensing and chemical detection. However, challenges persist in achieving scalable, cost-effective synthesis and enhancing detection sensitivity. In this study, we have developed a simple and environmentally friendly method to prepare blue graphene quantum dots, c-GQDs, using nitronaphthalene as a precursor, and yellow graphene quantum dots, y-GQDs, using nitronaphthalene doped acid. The quantum yield is 29.75%, and the average thickness is 2.08 nm and 3.95 nm, respectively. The synthesized c-GQDs exhibit a prominent cyan fluorescence at a wavelength of 490 nm under excitation at 380 nm, while the y-GQDs show a distinct yellow fluorescence at a wavelength of 540 nm under excitation at 494 nm. The introduction of p-aminobenzoic acid (PABA) introduced a marked red shift in fluorescence, attributed to the electron-withdrawing effect of the carboxyl groups on PABA. This key finding significantly enhanced the sensitivity of GQDs for detecting trace copper(II) ions (Cu

Indexed as

copper detectionelectron-withdrawing modulationfluorescence red shiftgraphene quantum dots (GQDs)nitrogen doping

Identifiers

PMID40142020
PMCPMC11946535

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.