Reagent for detecting mercury ion in water and its preparation method

A technology of chemical reagents and mercury ions, applied in the field of chemical reagents, can solve the problems such as the inability of optical chemical sensors of mercury ions to be practical, and achieve the effects of expanding the scope of use, rapid detection, and high selectivity.

Inactive Publication Date: 2006-03-29
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new type of chemosensor uses different mechanisms to measure both light absorption or emission caused by certain substances called mercuric chloride atoms attached to them. These measurements are then converted into electrical signals through various techniques like electrochemistry or photochemistry. By measuring these changes with an appropriate device, this technology allows us to accurately determine what types of harmful materials may exist at any given location within our environment without having physical contact between humans or other animals being tested.

Problems solved by technology

This patent describes two types of techniques called chemical sensitives and semiconductor quantum field emission devices - XCMS and ICRISZ3. There exist three main ways to measure metals like silver, copper, zinc, lead, cadmium, nickel, manganese, chromate, dichroism, cyclohexene compounds, and other elements commonly found around us today. Current methods involve laboratory analyzers and special equipment, making their assession slow down overcoming issues associated with current methods. Additionally, existing methods require extensive training and experience, leading to potential errors.

Method used

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  • Reagent for detecting mercury ion in water and its preparation method
  • Reagent for detecting mercury ion in water and its preparation method
  • Reagent for detecting mercury ion in water and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Preparation of rhodamine B lactam-based phenylthiourea. The structure of rhodamine B lactam phenylthiourea is as follows:

[0031]

[0032] First, synthesize rhodamine B hydrazide, add 1 part of rhodamine B to a round bottom flask, dissolve it with 40 parts of methanol, and then add 15 parts of 80% hydrazine hydrate. Heat to reflux until the purple color of rhodamine B disappears; filter and wash the obtained solid with water to obtain white rhodamine hydrazide, yield: 75%.

[0033] 1 HNMR (CDCl 3 ): δ7.93(m, 1H, ArH), 7.45(m, 2H, ArH), 7.11(m, 1H, ArH), 6.46(d, 2H, xanthene-H), 6.42(d, 2H, xanthene- H), 6.29(dd, 2H, xanthene-H), 3.61(s, 2H, NH 2 ), 3.34(q, 8H, NCH 2 CH 3 ), 1.17(t, 12H, NCH 2 CH 3 ).

[0034] ESI mass spectrometry, C 28 h 32 N 4 o 2 , m / z: 457.3 ([M+H] + ).

[0035] Synthesis of rhodamine B-lactamyl phenylthiourea: In a round bottom flask, add 1 part of rhodamine B hydrazide compound to 40 parts of CH 3 CN dissolves; then ...

Embodiment 2

[0039] Example 2: Preparation of rhodamine B lactam p-methoxyphenylthiourea. The structure of rhodamine B lactam p-methoxyphenylthiourea is as follows:

[0040]

[0041] First, synthesize rhodamine B hydrazide, add 1 part of rhodamine B to a round bottom flask, dissolve it with 40 parts of methanol, and then add 15 parts of 80% hydrazine hydrate. Heat to reflux until the purple color of rhodamine B disappears; filter and wash the obtained solid with water to obtain white rhodamine hydrazide, yield: 65%.

[0042] Synthesis of rhodamine B lactam-based p-methoxyphenylthiourea: In a round-bottomed flask, add 1 part of rhodamine B hydrazide compound to 45 parts of CH 3 CN dissolves; then add 3 parts of p-methoxyphenyl isothiocyanate. After the mixture was heated to reflux for 5 hours, the CH 3 CN, separated by column chromatography, the target product was obtained, yield: 25%.

[0043] ESI mass spectrometry, C 36 h 39 N 5 o 3 S, m / z: 621.9 (M + ).

Embodiment 3

[0044] Example 3: Preparation of rhodamine B lactam p-nitrophenylthiourea. The structure of rhodamine B lactam p-nitrophenylthiourea is as follows:

[0045]

[0046] First, rhodamine B hydrazide was synthesized: 1 part of rhodamine B was added to a round bottom flask, dissolved in 40 parts of ethanol, and then 15 parts of 80% hydrazine hydrate was added. Heat to reflux until the purple color of rhodamine B disappears; filter and wash the obtained solid with water to obtain white rhodamine hydrazide, yield: 65%.

[0047] Synthesis of rhodamine B lactam-based p-nitrophenylthiourea: In a round-bottomed flask, add 1 part of rhodamine B hydrazide compound to 50 parts of CH 3 CN dissolves; then add 3 parts of p-nitrophenyl isothiocyanate. After the mixture was heated to reflux for 6 hours, CH was removed 3 CN, separated by column chromatography to obtain the target product, yield: 30%.

[0048] ESI mass spectrometry, C 35 h 36 N 6 o 4 S, m / z: 636.8 (M + ).

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Abstract

The present invention relates to a chemical reagent for detecting mercury ion in water and its preparation method. Said invention provides the structural formula of said reagent, and its preparation method includes the following steps: firstly, synthesizing rhodamine hydrazide, adding rhodamine dye in container, dissolving by using organic solvent, adding hydrazine hydrate, heating to make reflux reaction until the rhodamine dye colour is eliminated, filtering, washing the obtained solid by using water to obtain rhodamine hydrazide compound, adding organic solvent to dissolve said compound, adding aryl isothiocyanate, heating mixture and making reflux reaction, removing organic solvent, using column chromatography to make separation so as to obtain target product.

Description

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Claims

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Application Information

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Owner XIAMEN UNIV
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