Rhodamine B functionalized luminescent metal–organic frameworks for ratiometric fluorescence sensing of hydroquinone

Abstract

The development of sensitive and selective detection methods for hydroquinone (HQ), a phenolic organic compound with high toxicity and low degradability, is of extraordinary importance. In this work, a fluorescence...

RhB-Embedded Mn-MOF with Cyclotriphosphazene Skeleton as Dual-Emission Sensor for Putrescine as well as Smart Fluorescent Response of Aromatic Diamines and Nitrophenol

“…With the gradual addition of a 10 –3 M putrescine solution, the blue-emission peak of RhB@1-0.4 decreased, while the red emission peak was significantly enhanced (Figure a). The fluorescence intensities at 429 and 578 nm were recorded (Figure b), and the ratio of I 429 / I 578 and PUT concentration showed a good linear relationship . It was fitted by the expression I 429 / I 578 = −1.671 × 10 –2 [Q] + 3.8583 (where I 429 and I 578 are the fluorescence intensity at 429 and 578 nm, respectively, after adding putrescine to the RhB@1-0.4 suspension, and [Q] represents the molar concentration (μM) of PUT solution).…”

“…The fluorescence intensities at 429 and 578 nm were recorded (Figure 4b), and the ratio of I 429 /I 578 and PUT concentration showed a good linear relationship. 43 It was fitted by the expression I 429 /I 578 = −1.671 × 10 −2 [Q] + 3.8583 (where I 429 and I 578 are the fluorescence intensity at 429 and 578 nm, respectively, after adding putrescine to the RhB@1-0.4 suspension, and [Q] represents the molar concentration (μM) of PUT solution). According to the formula 3σ/K (σ is the relative standard deviation of the blank solution) to calculate the putrescine detection limit (LOD), the detection limit is 6.8 μM.…”

Post-synthetic modified luminescent metal–organic framework for the detection of berberine hydrochloride in a traditional Chinese herb

“…To date, several uorescent sensors have been developed for the detection of BBH, including carbon dots, 6 quantum dots, 7 metal nanoclusters 8,9 and metal-organic frameworks (MOFs). 10 MOFs have been widely used in sample pretreatment, [11][12][13] catalysis, 14 drug delivery, 15 uorescence bioimaging, 16 and electrochemical and uorescence sensing [17][18][19] based on their controlled pore size, large specic surface area and tunable molecular structure. However, as far as we know, only a handful of MOFs-based uorescent sensors have been applied to the detection of ingredients in traditional Chinese herbs.…”

A UOF based on a cyclotriphosphazene skeleton: fluorescence sensing of different substituted aldehydes and NACs

“…Depleted uranium has been regarded as “waste,” and functional materials based on depleted uranium are not sufficient. 7–14 However, uranium actually has brighter luminescence characteristics compared with trivalent lanthanide metals because it has a special electronic layer configuration of 5f 3 6d 1 7s 2 . The photoluminescence based on UO 2 2+ is caused by the charge transfer between the 6d/5f hybrid molecular orbital and the 2p orbital of oxygen, which is not Laporte-forbidden like in lanthanide metals.…”

“…Depleted uranium has been regarded as ''waste,'' and functional materials based on depleted uranium are not sufficient. [7][8][9][10][11][12][13][14] However, uranium actually has brighter luminescence characteristics compared with trivalent lanthanide metals because it has a special electronic layer configuration of 5f 3 6d 1 7s 2 . The photoluminescence based on UO 2…”