Due to the fascinating structures and wide applications, porous materials with open frameworks have attracted more and more attentions. Herein, a novel two‐dimensional (2D) halogen‐bonded organic framework (XOF–TPPE) was successfully designed and fabricated by iodonium‐bridged N⋅⋅⋅I+⋅⋅⋅N interactions between pyridyl groups and I+ for the first time. The formation of XOF–TPPE and its linear analogue was monitored by 1H NMR, UV–Vis, X‐ray photoelectron spectroscopy (XPS), IR, SEM, TEM, HRTEM and selected‐area electron diffraction (SAED). The structural model of XOF–TPPE was established based on powder X‐ray diffraction (PXRD) data and theoretical simulations. Significantly, synchrotron small‐angle X‐ray scattering (SAXS), DLS and UV–Vis spectroscopy experiments suggested that XOF–TPPE still maintains a stable 2D framework structure in solutions. This research opens up a novel avenue for the development of organic frameworks materials, and may bring new promising applications for the field of porous materials.
As a photophysical phenomenon, aggregation-induced emission (AIE) was proposed by Tang in 2001. Due to the excellent fluorescence emission performance, the AIEgens and AIE-based fluorescence materials have shown great applications...
Abnormal
formaldehyde (FA) is known to induce a variety of diseases.
Herein, we report a novel and efficient method for ultrasensitive
detection of formaldehyde in gas and solutions by a catalyst preplaced
sensor based on the pillar[5]arene derivative (DP5J).
By the catalyzation of (CF3SO3)2Bi, DP5J could selectively and sensitively sense formaldehyde
through an aggregation-induced emission (AIE) “turn-on”
response within 7.5 s, and the detection limits for formaldehyde is
3.27 × 10–9 M. Moreover, a FA test kit was
prepared by loading the catalyst (CF3SO3)2Bi preplaced DP5J sensor (DP5J-Bi) on a silica gel plate. The test kit could conveniently and efficiently
detect formaldehyde in gas or solution with ultrasensitivity. The
catalysts preplaced method and FA reaction-induced AIE fluorescence
“turn-on” mechanism is a novel approach to achieve ultrasensitive
detection of FA. Importantly, it is also a novel approach for the
efficient detection of other volatile organic compounds.
Herein, an aggregation-induced emission (AIE) supramolecular organic framework gel (SOF-TPN-G) was successfully constructed from novel supramolecular polymer networks based on tripodal pillar[5]arene. The SOF-TPN-G shows fluorescent response for multiple metal ions. Interestingly, by introducing Fe 3+ , Cu 2+ , Cr 3+ , Ag + , Tb 3+ , and Eu 3+ into the SOF-TPN-G, respectively, a series of metallogels (SOF-Ms) with multicolor fluorescence was obtained. Moreover, based on these gels, an eight-unit sensor array was successfully developed, which exhibits a highly sensitive fluorescent response for
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