PVP functionalized NH₂-Ti-MOF fluorescence and colorimetric sensor for catechol

Area of Science:

• Materials Science
• Environmental Chemistry
• Analytical Chemistry

Background:

• Catechol is a vital industrial chemical but poses environmental and health risks due to its toxicity and poor degradability.
• Accurate detection of catechol is crucial for environmental monitoring and risk assessment.
• Existing detection methods may lack the sensitivity or specificity required for comprehensive analysis.

Purpose of the Study:

• To synthesize a novel PVP-functionalized NH2-Ti-MOF material.
• To develop a dual-mode sensor for the sensitive and accurate detection of catechol.
• To explore the application of this sensor in water sample analysis.

Main Methods:

• Synthesis of PVP-functionalized NH2-Ti-MOF using PVP, NH2-BDC, and TBOT.
• Construction of a dual-mode sensor based on fluorescence quenching and UV-Vis absorption.
• Investigation of the interaction between catechol and the synthesized MOF material.
• Validation of the sensor's performance in detecting catechol in aqueous solutions.

Main Results:

• Successful synthesis of PVP-NH2-Ti-MOF.
• Demonstration of fluorescence quenching at 428 nm upon catechol addition (static quenching).
• Observation of a new UV absorption peak at 282 nm, with intensity correlating to catechol concentration.
• Dual-mode detection exhibited enhanced accuracy, speed, and sensitivity compared to single-mode sensors.

Conclusions:

• The developed dual-mode sensor offers a highly effective method for catechol detection.
• PVP-NH2-Ti-MOF shows promise as a sensing material for environmental pollutants.
• This approach provides a novel strategy for real-time monitoring of catechol in water samples.