A dual‐function fluorescent probe for the detection of pH values and formaldehyde

Abstract

A dual‐function fluorescent probe (Probe 1) was developed in this work for the separate detection of pH value and formaldehyde (HCHO). Probe 1 could recognize HCHO and the pH value from the amino group. The colour of the probe solution was changed from grey blue to light blue with the increase in the pH value, and luminous intensity became larger with the increase in formaldehyde concentration. The curve function relationship between fluorescence intensity and the pH value was also determined. A smartphone containing a colour detector for imaging was used to record the values of the three primary colours (R value, G value, and B value) for the probe solution in formaldehyde. Importantly, there was a linear functional relationship between the B*R/G value with HCHO concentration. Therefore, the probe could be used as a rapid tool for the detection of formaldehyde. More importantly, Probe 1 was successfully used to detect formaldehyde in an actual distilled liquor sample.

A Ratiometric Fluorescent Probe Dye-Functionalized MOFs Integrated with Logic Gate Operation for Efficient Detection of Acetaldehyde

“…VOCs are ubiquitous in the air environment and significantly contribute to the deterioration of air quality [3,4]. Acetaldehyde is one of the major environmental pollutants associated with many human activities, such as cigarette smoke, vehicle exhaust, and solid biowaste, and the product of open burning of natural gas, oil and coal [5,6]. Prolonged exposure to acetaldehyde can pose significant health risks, including cognitive impairment such as memory loss, hallucinations and the loss of intelligence [7,8].…”