A Chalcone Based Flourescent Organic Material (FOM): Efficient Sensing of Lead Ions in Semi-Aqueous Medium| Chapter 8 | New Innovations in Chemistry and Biochemistry Vol.7

 Using standard spectroscopic and analytical techniques, a chalcone receptor 1 derived from pyrene has been developed, synthesised, and characterised. In semi-aqueous conditions, the probe 1 is used as a lead ion sensor. Over other competing heavy and transition metal ions, Receptor 1 showed a highly selective and sensitive detection of Pb2+. Other metal ions do not interfere with the turn "off-on" fluorescence detection of Pb2+ by 1. For the "off-on" fluorescence amplification, a putative PET mechanism is given. For the 1-Pb2+ complex, the detection limit of sensor 1 was found to be 0.11 10-6 M-1, and the association constant was found to be Ka = 1.18 x 105 M-2. In addition, the effects of time, pH, and the sensor's reversibility were studied.

Author(s) Details:

S. Suresh,
Fluorensic Materials Lab, Department of Applied Chemistry, Karunya Institute of Technology and Sciences, Coimbatore-641 114, India.

K. Velmurugan,
Fluorensic Materials Lab, Department of Applied Chemistry, Karunya Institute of Technology and Sciences, Coimbatore-641 114, India.

J. Prabhu,
Fluorensic Materials Lab, Department of Applied Chemistry, Karunya Institute of Technology and Sciences, Coimbatore-641 114, India.

R. Nandhakumar,
Fluorensic Materials Lab, Department of Applied Chemistry, Karunya Institute of Technology and Sciences, Coimbatore-641 114, India.

Please see the link here: https://stm.bookpi.org/NICB-V7/article/view/5924

Quinoline-Benzimidazole Conjugate Based Fluorescent Chemosensor: A Ratiometric Sensor for the Differentiation of Rutile and Anatase TiO2 Nanoparticles| Chapter 2 | New Innovations in Chemistry and Biochemistry Vol.7

 The quinoline-benzimidazole conjugate 1 was produced and analysed using standard spectroscopic and analytical techniques. As a possible fluorescent chemosensor, the probe is used to distinguish TiO2 anatase and rutile nanoparticles using the spectrofluorimetry technique. Probe 1 has a photoinduced electron transfer (PET) mechanism for selective TiO2 sensing and a ratiometric sensing response via an intramolecular charge transfer (ICT) mechanism for ratiometric sensing. Fluorescence titration data of TiO2 rutile and anatase phases with conjugate 1 were used to arrive at a 1:2 binding ratio, and the association constants (Ka) of 1+TiO2 anatase and 1+TiO2 rutile were calculated to be 6.34 104 M-2 and 5.179 104 M-2, respectively. Probe 1 had a detection limit of micro molar concentrations of TiO2 nanoparticles. Time and pH effects were also recorded. As a result, the probe 1 might be used on environmental and biological materials.

Author(s) Details:

K. Velmurugan,
Fluorensic Materials Laboratory, Department of Applied Chemistry, Karunya Institute of Technology and Sciences (Deemed-to-be University), Karunya Nagar, Coimbatore- 641114, India and College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, P.R. China.

S. Suguna,
Fluorensic Materials Laboratory, Department of Applied Chemistry, Karunya Institute of Technology and Sciences (Deemed-to-be University), Karunya Nagar, Coimbatore- 641114, India.

I. Sheebha,
Department of Applied Physics, Karunya Institute of Technology and Sciences (Deemed-to-be University), Karunya Nagar, Coimbatore- 641114, India.

C. Immanuel David,
Fluorensic Materials Laboratory, Department of Applied Chemistry, Karunya Institute of Technology and Sciences (Deemed-to-be University), Karunya Nagar, Coimbatore- 641114, India.

B. Vidhya,
Department of Applied Physics, Karunya Institute of Technology and Sciences (Deemed-to-be University), Karunya Nagar, Coimbatore- 641114, India.

J. Prabhu,
Fluorensic Materials Laboratory, Department of Applied Chemistry, Karunya Institute of Technology and Sciences (Deemed-to-be University), Karunya Nagar, Coimbatore- 641114, India.

R. Nandhakumar,
Fluorensic Materials Laboratory, Department of Applied Chemistry, Karunya Institute of Technology and Sciences (Deemed-to-be University), Karunya Nagar, Coimbatore- 641114, India.

Please see the link here: https://stm.bookpi.org/NICB-V7/article/view/5918

A Handy Detection Tool to Recognise DCNP (Nerve Gas Mimic) in Sea Water and Soil: An Awareness to Make a Better Environment| Chapter 1 | New Innovations in Chemistry and Biochemistry Vol.7

 The primary goal of this study is to design and synthesise some new chemosensors that are highly sensitive and selective for detecting harmful substances in aqueous medium. The capacity of toxic substances to connect with key cellular components such as structural proteins, enzymes, and nucleic acids and interfere with their functional functions makes them dangerous to the entire ecosystem. As a result, the development of effective 'in field' devices will require a reliable, simple, and reactive detection mechanism for such hazardous species. Nerve agents are organophosphorus chemicals that are extremely hazardous. They're utilised as chemical welfare agents because of their lethal effects on human and animal health; closely related compounds are widely used in the chemical industry. Although sea-dumping is one of the most common methods of disposing of chemical weapons, it can have catastrophic consequences such as disrupting the marine eco-system and introducing reactive and cyanogenic compounds into the food chain. To detect the nerve gas, we devised a simple and inexpensive paper strip sensing technology that can detect DCNP within optical range. At neutral pH, a chemosensor called carbazole-salicylaldehyde based imine (CSI) has been developed for the selective detection and measurement of nerve gas (Tabun) mimic DCNP in sea water and soil (pH 7.2, 10 mM Tris-HCl buffer).

Author(s) Details:

Shampa Kundu,
Department of Chemistry, Visva-Bharati University, Santiniketan 731235, W.B., India.

Shrabani Saha,
Department of Chemistry, Visva-Bharati University, Santiniketan 731235, W.B., India.

Prithidipa Sahoo,
Department of Chemistry, Visva-Bharati University, Santiniketan 731235, W.B., India.

Please see the link here: https://stm.bookpi.org/NICB-V7/article/view/5917