Fluorescent nitrogen-doped Ti3C2 MXene quantum dots as a unique “on-off-on” nanoprobe for chrominum (VI) and ascorbic acid based on inner filter effect

Biocompatible carbon dot decorated α-FeOOH nanohybrid for an effective fluorometric sensing of Cr (VI) in wastewater and living cells

“…Moreover, at higher quencher concentrations (> 10 µM concentration), the uorophores are surrounded by the quencher ions, which blocks the radiative path of the uorophores causing rapid uorometric quenching. Such phenomenon is known as inner lter effect [41][42][43]. Herein, simultaneous occurrence of the photoinduced electron transfer and inner lter effect is obtained at higher Cr (VI) concentrations, which justi es the exponential S-V plot.…”

Photocontrolled reversible modulation of lanthanide luminescence in mesoporous silica nanospheres by photochromic diarylethenes

“…In previous reports, the inner filter effect (IFE) and FRET are considered as two major mechanisms in the luminescence quenching. [52][53][54] In order to discriminate between the two mechanisms, luminescence decays were subsequently measured. As seen from Fig.…”

Tunable fluorescent amino-functionalized Ti3C2Tx MXene quantum dots for ultrasensitive Fe3+ ion sensing

“…The bands at 951, 1037, 1083, 1631 and 3014 cm −1 are attributed to the stretching vibrations of C-C, C-F, C-N, CvO and C-H, respectively. 17,23,34 Other strong bands in the regions around 1486 and 3425 cm −1 are assigned to the -OH bending and stretching vibrations, respectively. 35 In particular, compared with the MQDs, the significantly stronger bands at 1378, 1531 and 3120 cm −1 for the N-MQDs are associated with the C-N stretching vibration, N-H bending vibration and N-H stretching vibration, demonstrating the increased amount of amino groups on the N-MQDs.…”