Organic-inorganic Hybrid Nanocomposite from Polyhedral Oligomeric Silsesquioxane as a Fluorescent Sensor for Zn2+ Ions

doi:10.7503/cjcu20250237

Abstract

Abstract:

In this study， a novel organic-inorganic hybrid fluorescent sensor was designed and synthesized using salicylaldehyde and polyhedral oligomeric silsesquioxane（^{POSS） as raw materials. Through the reaction of salicylaldehyde with POSS-NH₂， POSS-Sa with a salicylaldehyde-Schiff base structure was obtained， and its structure was characterized by Fourier transform infrared spectroscopy（FTIR）， ultraviolet-visible spectroscopy（UV-Vis）， and nuclear magnetic resonance spectroscopy（NMR）. The results revealed that the fluorescence efficiency of POSS-Sa significantly increased in the presence of zinc ions（Zn²⁺）. As the concentration of Zn²⁺ increased， the fluorescence intensity of POSS-Sa gradually enhanced. Within a certain concentration range， the fluorescence intensity exhibited a linear relationship with Zn²⁺ concentration， following the calibration curve of y=10.31x+455.38（R²=0.997）. The linear detection range was 0.5—50×10⁻⁷ mol/L， with a detection limit of 1×10⁻⁸ mol/L. This sensor demonstrated high selectivity and sensitivity toward Zn²⁺ and was successfully applied to the detection of Zn²⁺ in food samples， showing high recovery rates. Additionally， due to its good biocompatibility， the sensor holds potential for Zn²⁺ detection in food samples and in vitro cellular environments.}

Key words: Polyhedral oligomeric silsesquioxane, Zn²⁺, Fluorescent probe, Salicylaldehyde Schiff

CLC Number:

O657

TrendMD:

JIANG Weina, JIANG Haijian, ZHOU Hui, CHENG Weiwei. Organic-inorganic Hybrid Nanocomposite from Polyhedral Oligomeric Silsesquioxane as a Fluorescent Sensor for Zn²⁺ Ions[J]. Chem. J. Chinese Universities, 2025, 46(12): 20250237.

Figures/Tables 11

References 24

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Sample	Detection Method	Sample size， n	10⁶ Average detection value	SD	t⁃test	Significance annotation
Green Tea	POSS⁃Sa	6	4.254	0.062	t=1.28 p=0.27	ns
Green Tea	AAS	6	4.369	0.037	t=1.28 p=0.27	ns
Soybean	POSS⁃Sa	6	3.279	0.017	t=1.53 p=0.20	ns
Soybean	AAS	6	3.336	0.018	t=1.53 p=0.20	ns
Apple	POSS⁃Sa	6	0.187	0.004	t=1.82 p=0.15	ns
Apple	AAS	6	0.192	0.003	t=1.82 p=0.15	ns

Sample	Detection Method	Sample size， n	10⁶ Average detection value	SD	t⁃test	Significance annotation
Green Tea	POSS⁃Sa	6	4.254	0.062	t=1.28 p=0.27	ns
Green Tea	AAS	6	4.369	0.037	t=1.28 p=0.27	ns
Soybean	POSS⁃Sa	6	3.279	0.017	t=1.53 p=0.20	ns
Soybean	AAS	6	3.336	0.018	t=1.53 p=0.20	ns
Apple	POSS⁃Sa	6	0.187	0.004	t=1.82 p=0.15	ns
Apple	AAS	6	0.192	0.003	t=1.82 p=0.15	ns

Organic-inorganic Hybrid Nanocomposite from Polyhedral Oligomeric Silsesquioxane as a Fluorescent Sensor for Zn²⁺ Ions

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