Two multifunctional stimuli-responsive materials with room-temperature phosphorescence and their application in multiple dynamic encryption

Abstract

The development of multifunctional stimuli-responsive materials with room-temperature phosphorescence (RTP) has been demonstrated to be one of the most important families of stimuli-responsive materials and remains a great challenge at...

Three-Dimensional Viologen-Based Lanthanide–Organic Frameworks: Photochromism and Fluorescence Detection of Quinolone Antibiotics

“…Multifunctional stimulus-responsive materials are a category of materials that can change their color or properties in response to external stimuli and have attracted widespread attention owing to their wide application in smart windows, information storage, energy conversion, and inkless printing. − Viologen-functionalized complexes are typically multifunctional materials that can respond to external stimuli (such as UV light, X-rays, heat, and electropotential) and exhibit color changes discerned with the naked eye. − Nevertheless, as a branch of metal–organic frameworks (MOFs), viologen-based complexes are more widely studied for their photochromic properties due to their unique electron-deficient property, whereas the fluorescence sensing aspect is rarely studied. On the other hand, lanthanide MOFs (Ln-MOFs) for their unique luminescent properties (such as high quantum yield, long-lived emission, and large Stokes shifts) have been widely studied in the field of detection. − Up to now, some MOF materials for detecting antibiotics have been reported. ,,− However, the integration of photochromic and fluorescent probes to detect NORF and CIP in viologen-based Ln-MOFs has not been investigated. Thus, it is important to design and synthesize multifunctional viologen-based Ln-MOFs.…”

Solvent-Modulated Self-Assembly of Naphthalenediimide-Based Cd(II) Complexes and the Controllable Photochromism via Conformational Isomerization

“…As the volume content of DMF increases, the fluorescence intensity of 2 progressively declines, which corresponds to the deepening of the color of sample 2 shown in Figure with the increase of the volume content of DMF. Furthermore, After illumination, the strong absorption of the photo-generated [NDI] − · radicals in the range of 450–850 nm overlaps with the fluorescence emission region (500–800 nm) of 2 , indicating a strong self-absorption, which leads to the quenching of the fluorescence emission of 2 . These findings imply that photochromism and photomodulated fluorescence coexist and that 2 was a possible luminescent organic–inorganic hybrid material with a controlled luminescent switch.…”

“…Furthermore, After illumination, the strong absorption of the photo-generated [NDI] −• radicals in the range of 450− 850 nm overlaps with the fluorescence emission region (500− 800 nm) of 2, indicating a strong self-absorption, which leads to the quenching of the fluorescence emission of 2. 55 These findings imply that photochromism and photomodulated fluorescence coexist and that 2 was a possible luminescent organic−inorganic hybrid material with a controlled luminescent switch.…”

Enhancement of Long-Lived Persistent Room-Temperature Phosphorescence and Anion Exchange with I– and SCN– via Metal–Organic Hybrid Formation

“…In our previous work, 30,52,53 the RTP complexes based on viologen are mainly induced by long-lived molecules, such as isophthalic acid and trimesic acid. Recently, some complexes with photochromism and RTP are also reported (Table S5).…”