Fluorescent polynaphthalene as well as preparation method and application thereof

A fluorescent and polynaphthalene technology, applied in the field of analytical chemistry, can solve the problems of low molecular weight of polynaphthalene, and achieve the effects of low preparation cost, wide application prospects, and simple operation

Inactive Publication Date: 2011-10-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the polynaphthalene obtained in this way has a very low molecular weight and cannot be regarded as a real polymer.

Method used

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  • Fluorescent polynaphthalene as well as preparation method and application thereof
  • Fluorescent polynaphthalene as well as preparation method and application thereof
  • Fluorescent polynaphthalene as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～9

[0038] Embodiment 1~9: the synthesis of polynaphthalene

Embodiment 1

[0039] Embodiment 1: the iron trichloride of 1622.0mg (10.00mmol) is dissolved in 20mL nitromethane, ultrasonic 10 minutes promotes its dissolution, adopts single-layer filter paper to filter then, removes impurity, obtains the nitromethane of ferric chloride solution, and use precision pH test paper to measure the pH value of the ferric chloride solution; dissolve 2564 mg (2.00 mmol) of naphthalene monomer in 5 mL of nitromethane, and ultrasonically promote its dissolution for 5 minutes. The nitromethane solution of ferric chloride and the nitromethane solution of naphthalene were respectively placed in a constant temperature water bath with a temperature of 50° C. for 30 minutes. Then add the nitromethane solution of ferric chloride into the nitromethane solution of naphthalene monomer at one time, turn on the stirring device, and closely observe the reaction phenomenon. Dip the mixed solution with a glass rod to measure its pH value, and put a wet precision pH test paper on...

Embodiment 2

[0040] Embodiment 2: repeat embodiment 1, but change oxidizing agent and monomer molar ratio and be 3 / 1, promptly take by weighing ferric chloride 984.42mg (6.00mmol), all the other operations are the same as embodiment 1, obtain polynaphthalene productive rate and be 50.1% .

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Abstract

The invention provides fluorescent polynaphthalene. Amorphous powdery polynaphthalene is obtained by polymerizing a naphthalene monomer with a one-step method based on a lewis acid as a catalytic oxidant in a nitro alkane system. The preparation method has the advantages that operation is simple, preparation cost is low and the like, and is easy to carry out industrial batch production. Polynaphthalene prepared by the method has a specific linear structure characteristic, and the polymerization degree of polynaphthalene is in a range from 3 to 29. Polynaphthalene is a blue fluorescent emitter the luminous capacity of which is far superior to that of the naphthalene monomer, and a Fe<3+> quenching type fluorescent chemical sensor constructed by polynaphthalene can achieve sensing detection of Fe<3+> ions in a concentration rang of 10<-6>-10<-3>mol / L. Polynaphthalene has strong anti-interference capability, and the detection of polynaphthalene is not substantially influenced by alkali metal ions, alkaline earth metal ions and transition metal ions such as Hg<2+>, Co<2+>, Pb<2+> and the like. The polymer can be widely used in the fields of chemistry and chemical engineering, sensing detection, analysis test and the like.

Description

technical field [0001] The invention belongs to the field of analytical chemistry, and specifically relates to a luminescent polynaphthalene, a synthesis method thereof and an application for detecting iron ion concentration. Background technique [0002] Polynaphthalene is one of the earliest and most promising polymers among fused-ring aromatic polymers. The synthesis of polynaphthalene can be traced back to the 1960s, when Japanese scientist Kovacic Peter was using Lewis acid such as FeCl 3 (Kovacic P, Koch F W. Polymerization of benzene to p-Polyphenyl by ferric chloride. J. Org. Chem., 1963, 28 (7): 1864-1867), MoCl 5 (Kovacic P, Lange R M. Polymerization of benzene to p-polyphenylby molybdenum pentachloride. J. Org. Chem., 1963, 28 (4): 968-972), AlCl 3 -CuCl 2 (Kovacic P, Kyriakis A. Polymerization of benzene to p-Polyphenyl by aluminum chloride-cupric chloride. J. Am. Chem. Soc., 1963, 85: 454-458) etc. are obtained by oxidative dehydrogenation polycondensation of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/10C09K11/06G01N21/64
Inventor 黄美荣李新贵高鹏
Owner TONGJI UNIV
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