Chemosensors

Open access peer-reviewed chapter.

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Chemosensors

A molecular sensor or chemosensor is a molecular structure organic or inorganic complexes that is used for sensing of an analyte to produce a detectable change or a signal. The application of chemosensors is referred to as chemosensing, which is a form of molecular recognition. All chemosensors are designed to contain a signalling moiety and a recognition moiety , that is connected either directly to each other or through a some kind of connector or a spacer. Chemosensors may also be electrochemically based. Small molecule sensors are related to chemosensors. These are traditionally, however, considered as being structurally simple molecules and reflect the need to form chelating molecules for complexing ions in analytical chemistry. Chemosensors are synthetic analogues of biosensors , the difference being that biosensors incorporate biological receptors such as antibodies, aptamers or large biopolymers. Chemosensors describes molecule of synthetic origin that signal the presence of matter or energy. A chemosensor can be considered as type of an analytical device. Chemosensors are used in everyday life and have been applied to various areas such as in chemistry, biochemistry, immunology, physiology, etc. The signalling moiety acts as a signal transducer , converting the information recognition event between the chemosensor and the analyte into an optical response in a clear and reproducible manner. Most commonly, the change the signal is observed by measuring the various physical properties of the chemosensor, such as the photo-physical properties seen in the absorption or emission , where different wavelengths of the electromagnetic spectrum are used.

In other words, the fluorescence intensity and quantum yield are enhanced upon analyte recognition. Information Homepage How to publish in this journal chemosensors chemosensors.

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Fluorescent chemosensors for ions and neutral analytes have been widely applied in many diverse fields such as biology, physiology, pharmacology, and environmental sciences. The field of fluorescent chemosensors has been in existence for about years. Despite the progress made in this field, several problems and challenges still exist. This tutorial review introduces the history and provides a general overview of the development in the research of fluorescent sensors, often referred to as chemosensors. This will be achieved by highlighting some pioneering and representative works from about 40 groups in the world that have made substantial contributions to this field. The basic principles involved in the design of chemosensors for specific analytes, problems and challenges in the field as well as possible future research directions are covered.

Chemosensors

A molecular sensor or chemosensor is a molecular structure organic or inorganic complexes that is used for sensing of an analyte to produce a detectable change or a signal. The application of chemosensors is referred to as chemosensing, which is a form of molecular recognition. All chemosensors are designed to contain a signalling moiety and a recognition moiety , that is connected either directly to each other or through a some kind of connector or a spacer. Chemosensors may also be electrochemically based. Small molecule sensors are related to chemosensors. These are traditionally, however, considered as being structurally simple molecules and reflect the need to form chelating molecules for complexing ions in analytical chemistry.

Synonyms for destructive

One of the most valuable response methods for optical readout is fluorescence. Year SJR 0. ISSN X. Fluorescent chemosensors for copper II ion: Structure, mechanism and application. SCImago Graphica Explore, visually communicate and make sense of data with our new data visualization tool. Chemosensors may also be electrochemically based. The detection of anions is generally effectuated via analytic techniques such as Ionic chromatography. Combining both of these components can be achieved in a number of ways, such as integrated, twisted or spaced. Accordingly, a fluorescent chemosensor is developed by connecting a receptor ionophore to a fluorophore responsible for converting the recognition into the photophysical signal like spectra, fluorescence quantum yield, and lifetime. Chemosensors of Ion and Molecule Recognition. If the FRET is operative in the molecules, they are typically applied to improve the stokes shift artificially. Design strategies and progress on xanthene-based fluorescent probe for metal ions. The chemosensors is not emissive in its 'free' form A, but upon recognition of the phosphate by the polyamine receptor moiety through mixture of electrostatic and hydrogen bonding interactions B, the fluorescence emission is gradually enhanced, resulting eventually in the formation of a highly fluorescent host:guest structure C.

Open access peer-reviewed chapter. Chemosensors for anions and cations detections have been extensively used in several disciplines, including pharmacology, environmental science, biology, and chemistry. This field which is a division of supramolecular chemistry has been known for more than years.

Chemosensors present a promising technology for detecting toxic anions and cations in an aqueous medium. In the s the development of chemosensing was achieved by Anthony W. Such sensors have been developed for other cations, as well as anions and larger organic and biological molecules, such as proteins and carbohydrates. A turn-on fluorescent chemosensor based on aggregation-induced emission for cyanide detection and its bioimaging applications. Citations per document. Interaction of saxitoxin with the sensor's crown ether moiety kills its PET process towards the fluorophore and fluorescence is switched from off to on. The compound saxitoxin is a neurotoxin found in shellfish and a chemical weapon. Keywords chemosensors colorimetric fluorescence anions and cations detection optical chemosensors. While the signalling moiety acts as a signal transducer, converting the recognition event into an optical response. In this contribution, both colorimetric and fluorometric chemosensors will be discussed, focusing on fluorometric receptors. Chemical Reviews. In principle the two mechanisms are based on the same idea; the communication pathway is in the form of a through-space electron transfer from the electron rich receptors to the electron deficient fluorophores through space. The incorporation of chemosensors onto surfaces, such as quantum dots , nanoparticles , or into polymers is also a fast-growing area of research. The SJR is a size-independent prestige indicator that ranks journals by their 'average prestige per article'.