Metal-to-ligand charge transfer chirality-based sensing of mercury ions

Xiongbin Wang; Qiushi Wang; Yulong Chen; Jiagen Li; Ruikun Pan; Xing Cheng; Kar Wei Ng; Xi Zhu; Tingchao He; Jiaji Cheng; Zikang Tang; Rui Chen

doi:10.1364/PRJ.413592

Photonics Research, Volume. 9, Issue 2, 213(2021)

Metal-to-ligand charge transfer chirality-based sensing of mercury ions

Xiongbin Wang^1,2、†, Qiushi Wang^3、†, Yulong Chen^1,4、†, Jiagen Li⁵, Ruikun Pan³, Xing Cheng⁴, Kar Wei Ng¹, Xi Zhu⁵, Tingchao He^6,7、*, Jiaji Cheng^3,8、*, Zikang Tang^1,9、*, and Rui Chen^2,10、*

Author Affiliations

¹Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macau 999078, China

²Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China

³School of Materials Science and Engineering, Hubei University, Wuhan 430062, China

⁴Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China

⁵Shenzhen Institute of Artificial Intelligence and Robotics for Society (AIRS), Shenzhen 518172, China

⁶College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China

⁷e-mail: tche@szu.edu.cn

⁸e-mail: jiajicheng@hubu.edu.cn

⁹e-mail: zktang@um.edu.mo

¹⁰e-mail: chenr@sustech.edu.cn

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Figures & Tables(8)

Fig. 1. Illustration of the synthesis process of chiral Cys-MoO2 NPs and their application for Hg2+ sensing.

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Fig. 2. (a) TEM image of D-Cys-MoO2 NPs. The corresponding scale bar is 100 nm. (b) Histogram distribution of the diameter of NPs. Measurements of (c) circular dichroism spectrum and (d) absorption spectrum of MoO3 (black line), L-Cys-MoO2 (red line), and D-Cys-MoO2 NPs (blue line). XPS spectra of (e) MoO3 NPs and (f) D-Cys-MoO2 NPs with deconvoluted molybdenum 3d peaks. The blue and orange peak areas are corresponding to the different valence states of Mo(VI) and Mo(IV), respectively.

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Fig. 3. Chiroptical sensing of Hg2+ using Cys-MoO2 NPs. (a) CD and (b) absorption measurements for Hg2+ mixing with aqueous D-Cys-MoO2 and L-Cys-MoO2 NPs solution. The concentration of Hg2+ in the mixture varied from 0.1 nM to 30 nM. (c) Calculated g-factor curves of specimens in (a). (d) Differences of g-factor [values at 384 nm shown in (c)] versus Hg2+ concentration and corresponding fitting curve. The inset image is the calibration plot.

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Fig. 4. (a) TGA curves of L-Cys-MoO2 NPs with different amounts of mercury after dialysis. (b) Ligand density varies with mercury ion concentrations. (c) CD and (d) absorption spectra of pure L-Cys-MoO2 NPs as well as L-Cys-MoO2 mixing with Hg2+ (10 nM in the mixture) under different reaction times.

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Fig. 5. TD-DFT simulation for different amounts of D-Cys capped Mo4O8 nanoclusters. Calculated frontier molecular orbital of (a), (c) HOMO and (b), (d) LUMO for one Cys molecule capped and six Cys molecule capped Mo4O8 nanoclusters. Calculated (e) CD spectra and (f) absorption spectra.

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Fig. 6. Selectivity of D-Cys-MoO2-based Hg2+ sensor. (a) CD spectra of D-Cys-MoO2 solution mixed with different heavy metal ions: Zn2+, Cd2+, Pb2+, Ag+, Cu2+, and Hg2+. (b) CD signal at 384 nm of mixtures measured in (a). The concentrations of all metal ions are settled at 10 nM.

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Table 1. Comparison of the Proposed Probe with Previously Reported ${Hg}^{2 +}$ Sensors Based on Different Methods^a

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Table 1. Comparison of the Proposed Probe with Previously Reported ${Hg}^{2 +}$ Sensors Based on Different Methods^a

Methods	System	Detection Range (nM)	LOD (nM)	Ref.
SERS	Au $NPs / rGO / {SiO}_{2} / Si$	0.1–6000	0.1	[42]
	Au TNAs/graphene/Au NPs	1–45,000	8.3	[43]
	4-MPY-Ag NPs	1–100	0.34	[44]
Absorption	DNA-Au NPs	0–5000	500	[45]
	$N - T$ -Au NPs	50–250	0.8	[46]
	Hcy-SH	0–1000	72	[47]
PL	$APBA - {MoS}_{2}$	5–41,000	1.8	[48]
	$N$ -doped-CNDs	0–300,000	80	[49]
	DNA-SWNTs	50–8000	14.5	[50]
Electrochemistry	$HNTs - {Fe}_{3} O_{4} - {MnO}_{2}$	2.5–750	1	[51]
	MSO-Au NPs	0–100	0.5	[52]
	DNA-Fc	1–2000	0.5	[53]
CD	DNA-Au NRs	0.25–50	0.15	[54]
	Ag-L-Cys NPs	0–1000	9	[55]
	$D - Cys - {MoO}_{2} NPs$	0.1–30	0.08	This work
	$L - Cys - {MoO}_{2} NPs$	0.1–30	0.12	This work

Table 2. Summary of Calculated Mass Loss and Ligand Density for $L - Cys - {MoO}_{2}$ NPs with Different ${Hg}^{2 +}$ Additions
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Table 2. Summary of Calculated Mass Loss and Ligand Density for $L - Cys - {MoO}_{2}$ NPs with Different ${Hg}^{2 +}$ Additions
${Hg}^{2 +}$ Concentration (nM) Mass Loss (%) Ligand Density ( ${nm}^{- 2}$ )
0 13.1 17.96
0.1 12.4 16.86
1 11.8 15.94
5 11.4 15.33
10 10.9 14.57
30 10.1 13.38

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Xiongbin Wang, Qiushi Wang, Yulong Chen, Jiagen Li, Ruikun Pan, Xing Cheng, Kar Wei Ng, Xi Zhu, Tingchao He, Jiaji Cheng, Zikang Tang, Rui Chen, "Metal-to-ligand charge transfer chirality-based sensing of mercury ions," Photonics Res. 9, 213 (2021)

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Paper Information

Category: Optical and Photonic Materials

Received: Oct. 29, 2020

Accepted: Dec. 13, 2020

Published Online: Jan. 29, 2021

The Author Email: Tingchao He (tche@szu.edu.cn), Jiaji Cheng (jiajicheng@hubu.edu.cn), Zikang Tang (zktang@um.edu.mo), Rui Chen (chenr@sustech.edu.cn)

DOI:10.1364/PRJ.413592

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Comparison of the Proposed Probe with Previously Reported Hg2+ Sensors Based on Different Methodsa

Table 1. Comparison of the Proposed Probe with Previously Reported Hg2+ Sensors Based on Different Methodsa

Table 2. Summary of Calculated Mass Loss and Ligand Density for L-Cys-MoO2 NPs with Different Hg2+ Additions

Table 2. Summary of Calculated Mass Loss and Ligand Density for L-Cys-MoO2 NPs with Different Hg2+ Additions

Table 1. Comparison of the Proposed Probe with Previously Reported ${Hg}^{2 +}$ Sensors Based on Different Methods^a

Table 1. Comparison of the Proposed Probe with Previously Reported ${Hg}^{2 +}$ Sensors Based on Different Methods^a

Table 2. Summary of Calculated Mass Loss and Ligand Density for $L - Cys - {MoO}_{2}$ NPs with Different ${Hg}^{2 +}$ Additions

Table 2. Summary of Calculated Mass Loss and Ligand Density for $L - Cys - {MoO}_{2}$ NPs with Different ${Hg}^{2 +}$ Additions