Supramolecular Luminescent Sensors

Abstract

There is great need for stand-alone luminescence-based chemosensors that exemplify selectivity, sensitivity, and applicability and that overcome the challenges that arise from complex, real-world media. Discussed herein are recent developments toward these goals in the field of supramolecular luminescent chemosensors, including macrocycles, polymers, and nanomaterials. Specific focus is placed on the development of new macrocycle hosts since 2010, coupled with considerations of the underlying principles of supramolecular chemistry as well as analytes of interest and common luminophores. State-of-the-art developments in the fields of polymer and nanomaterial sensors are also examined, and some remaining unsolved challenges in the area of chemosensors are discussed. CONTENTS 4.4. Explosives 4.5. Pharmaceutical Agents 4.6. Biologically Relevant 4.6.1. Adenosine Triphosphate (ATP)

Tuning Intramolecular Charge Transfer through Adjusting Hydrogen Bonding by Anions

“…These intramolecular processes could lead to the transient alternation of the electronic properties such as energies of electronic state, electron density distribution and dipole moments, which could tune the emission color by both covalent modifications of the fluorescence chromophores and its non‐covalent interactions with the surrounding micro‐environment . Therefore, molecules capable of ICT have practical and potential applications in sensing,– nonlinear optics, catalysis, semiconducting, thermochromism, organic light‐emitting materials…”

Harnessing Photoluminescent Properties of Carbon Nitride Nanosheets in a Hierarchical Matrix

“…Owing to conjugated system of most PAHs, it is feasible to develop a PL chemosensor to detect PAHs via one or more delicate photophysical mechanisms, such as fluorescence resonance energy transfer and inner‐filter effect (IFE) . However, despite numerous efforts, development of photoactive materials which are highly efficient and stable, low cost, and environment‐friendly for large‐scale application is still of challenge …”

Carboxylato-pillar[6]arene-based fluorescent indicator displacement assays for the recognition of monoamine neurotransmitters

“…[1][2][3] Articial receptor molecules operating through host-guest interactions capable of selective molecular recognition can be applied in supramolecular analytical systems to detect and quantify the analytes of interest. [4][5][6] Macrocycles, due to their inherent structural nature are ideal hosts for various biomolecules, however, attaching a signaling group to the water soluble derivatives is highly challenging. 7 This can be overcome by using uorescent indicator displacement (FID) assays, exploiting the competitive binding of a uorescent indicator to the macrocycle.…”