This thesis deals with Fluorochemosensors. Fluorescence spectroscopy and ultraviolet techniques have been applied to various analytical, bio-analytical, environmental, medical and forensic investigations. Several analytical methods that are offered for recognition of target concerned such that flame photometry, AAS, HPLC, mass spectrometry, ion sensitive electrode, microprobe analysis, neutron activation analysis, have been developed. But these methods are expensive and time uncontrollable process that involves complicated instrumentation and do not allow permanent monitoring. When compared to absorption techniques, flourimetric method is more sensitive and selective and rapidly performed. In nature, any compound analysed by using a suitable analytical technique which basically depends on the nature and properties of the target compound. If the target compound exhibit phenomenon called as Luminescence where the emission of electromagnetic radiation of longer wavelength to that of absorbed radiation can be seen are analysed by using the modern spectroscopic technique called as "flourimetry"
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Hence, significant hard works are life form complete to develop selective fluorescent sensor for recognition of targeted species. To blind date different fluorescent molecular sensors with different excitation and emission wavelengths comprise be employed such like coumarin, 1,8-naphthamide, pyrene, xanthenes, cynine, squaraine, boron dipyrromethene difuoride, nitrobenzofurazan etc.
In outline, cinnamaldehyde - rhodamine based signalling systems were designed and synthesized for the selective recognition of Fe+3 ions. The cinnamaldehyde molecule was used as a recognition moiety and rhodamine-B was used as a signalling moiety. The excellent fluorescent response to Fe+3 in ACN solution can be detected even by the naked eye, which provides a facile method for the visual detection of Fe+3. Complexation of the Fe+3 ions opens the spirolactum ring of rhodamine moieties to produce specific color change as well as fluorescence development.
Inhaltsverzeichnis (Table of Contents)
- Introduction
- Phenomena of fluorescence and phosphorescence
- Design of fluorescent molecular sensors
- Photophysical mechanisms of fluorescent sensors
- Photoinduced electron transfer (PET)
- Energy transfer quenching (ET)
- Fluorescent chemosensors based on rhodamine
- Aim and outline of the current work
- Experimental work
- Materials and physical measurements
- Synthesis of chemosensors SAR-31 and SAR-27
- Ion bonding study
- Result and discussion
- Synthesis and characterizations
- Stoichiometry and binding mode study
- Conclusion
- References
Zielsetzung und Themenschwerpunkte (Objectives and Key Themes)
This work aims to explore the principles of fluorescence and phosphorescence, focusing on the design and application of fluorescent molecular sensors. It details the synthesis and characterization of specific chemosensors and investigates their binding modes. The research delves into the photophysical mechanisms underlying these sensors’ function.
- Fluorescence and Phosphorescence Mechanisms
- Design and Synthesis of Fluorescent Molecular Sensors
- Photophysical Processes in Fluorescent Sensors (PET and ET)
- Chemosensor Characterization and Binding Studies
- Application of Rhodamine-based Chemosensors
Zusammenfassung der Kapitel (Chapter Summaries)
Introduction: This chapter provides a comprehensive overview of fluorescence spectroscopy and its applications in various fields, highlighting the advantages of fluorimetric methods over other analytical techniques. It introduces the concept of luminescence, differentiating it from incandescence, and then focuses specifically on fluorescence and phosphorescence. The chapter details the Jablonski diagram as a tool for visualizing these processes, explaining internal conversion, fluorescence, intersystem crossing, and phosphorescence with detailed descriptions of their mechanisms and characteristics. The significance of understanding these fundamental processes for designing effective fluorescent sensors is underscored. The chapter concludes by outlining the aim and scope of the current work.
Experimental work: This chapter describes the materials and methods used in the research. It outlines the synthesis of the chemosensors SAR-31 and SAR-27, providing a detailed account of the experimental procedures involved. Furthermore, it explains the methodology employed for studying the ion-bonding properties of these synthesized compounds, detailing the experimental setup and techniques used for data acquisition and analysis. The importance of rigorous experimental design and meticulous execution in obtaining reliable results for evaluating sensor performance is implicitly emphasized.
Result and discussion: This chapter presents the findings of the experimental work. It details the synthesis and characterization of the newly synthesized chemosensors, providing experimental data and spectroscopic analysis to confirm their structural properties. The key focus is on the stoichiometry and binding mode studies, where the results are analyzed in detail to understand how the chemosensors interact with their target ions. The discussion section likely integrates the results from different subchapters to form a coherent narrative about the chemosensors' performance and binding mechanisms. The chapter’s importance stems from providing the key data and interpretations essential for evaluating the effectiveness and potential applications of the novel chemosensors.
Schlüsselwörter (Keywords)
Fluorescence, phosphorescence, fluorescent molecular sensors, photoinduced electron transfer (PET), energy transfer quenching (ET), rhodamine, chemosensors, synthesis, characterization, stoichiometry, binding mode, luminescence, spectroscopy.
Frequently Asked Questions: A Comprehensive Language Preview on Fluorescent Molecular Sensors
What is the main topic of this document?
This document is a comprehensive language preview of research on fluorescent molecular sensors. It covers the design, synthesis, characterization, and binding mechanisms of these sensors, with a specific focus on rhodamine-based chemosensors.
What are the key themes explored in this research?
Key themes include the principles of fluorescence and phosphorescence, the design and synthesis of fluorescent molecular sensors, photophysical processes such as photoinduced electron transfer (PET) and energy transfer quenching (ET), chemosensor characterization and binding studies, and the application of rhodamine-based chemosensors.
What specific chemosensors are synthesized and studied?
The research focuses on the synthesis and characterization of two specific chemosensors: SAR-31 and SAR-27. The document details the experimental procedures used for their synthesis.
What photophysical mechanisms are discussed?
The document explains photoinduced electron transfer (PET) and energy transfer quenching (ET) as the primary photophysical mechanisms underlying the function of the fluorescent sensors.
What methods are used to characterize the chemosensors?
The characterization methods include spectroscopic analysis to confirm structural properties and studies to determine the stoichiometry and binding modes of the chemosensors with target ions. The experimental procedures are described in detail.
What are the main findings of the research (as summarized)?
The "Result and discussion" chapter presents the findings regarding the synthesis, characterization, stoichiometry, and binding mode studies of the synthesized chemosensors. Detailed experimental data and analysis are provided to evaluate the effectiveness and potential applications of the novel chemosensors.
What is the purpose or objective of this research?
The research aims to explore the principles of fluorescence and phosphorescence and their application in designing and using fluorescent molecular sensors. It investigates the synthesis, characterization, and binding mechanisms of specific chemosensors to enhance understanding of their functionality.
What is the structure of the document?
The document includes an introduction, experimental procedures, results and discussion, a conclusion, and a list of references. A detailed table of contents provides an overview of the different sections.
What are the key words associated with this research?
Key words include: Fluorescence, phosphorescence, fluorescent molecular sensors, photoinduced electron transfer (PET), energy transfer quenching (ET), rhodamine, chemosensors, synthesis, characterization, stoichiometry, binding mode, luminescence, spectroscopy.
- Quote paper
- Ajay Desai (Author), 2016, Design and synthesis of Fluorochemosensors and their cation recognition study, Munich, GRIN Verlag, https://www.grin.com/document/470765
