Preparation method of stretchable fluorescent color-changing material
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A technology of color-changing materials and fluorescence, applied in the field of fluorescent materials, can solve problems such as insufficient research, limited types of fluorescent color-changing materials, and difficulty in adjusting fluorescent colors
Active Publication Date: 2021-07-06
EAST CHINA UNIV OF SCI & TECH
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In recent years, fluorescent color-changing functional materials have received more and more attention. However, it is currently difficult to achieve controllable adjustment of fluorescent color by external force, and the corresponding research in this field is not sufficient.
So far, the types of fluorescent color-changing materials are still limited, and their luminescent properties and synthesis methods still need to be further explored.
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preparation example Construction
[0041] (1) Preparation of dihydrodiphenylphenazine derivatives:
[0042] From N9, N10-di (phenyl) Philippine-9,10-diamine as raw material synthesis, prepared dihydrobenzide derivatives, as shown in formula (I):
[0043]
[0044] In the formula (I), R is -H or -CN (DPAC-CN).
[0045] In the present embodiment, the structure shown in the formula (I) is not limited, and R can also be other groups.
[0046] In the present embodiment, R is -H (DPAC) or -CN (DPAC-CN), the multiple fluorescence emission spectrum of the dihydrobenzine (DPAc) class derivative, such as figure 1 Indicated.
[0047] (2) Synthesis of doped polymers based on the stretchable fluorescent discoloration material of the formula (I) structure:
[0048] The dihydrophenylphenazine derivative (mass ratio 0.1-5 wt%) as shown in the formula (I) structure is mixed with polycaprolactone (PCL), in this example, as a preferred solution, The dihydrobenzide derivative shown in formula (I) is mixed with polyhexol (PCl) in a cu...
Embodiment 2
[0054] (1) Preparation of dihydrodiphenylphenazine derivatives:
[0055] From N9, N10-di (phenyl) Philippine-9,10-diamine as raw material synthesis, prepared dihydrobenzide derivatives, as shown in formula (I):
[0056]
[0057] In the formula (I), R is -H or -CN.
[0058] In the present embodiment, the structure shown in the formula (I) is not limited, and R can also be other groups.
[0059] In the present embodiment, R is -H (DPAC) or -CN (DPAC-CN), the multiple fluorescence emission spectrum of the dihydrobenzine (DPAc) class derivative, such as figure 1 Indicated.
[0060] (2) Synthesis of doped polymers based on the stretchable fluorescent discoloration material of the formula (I) structure:
[0061] The dihydrobenzide derivative as shown in the formula (I) structure is mixed with ethylene-vinyl acetate copolymer (EVA), in this example, as a preferred solution, the formula (I) structure The dihydrobenzide derivative shown in 0.2% by weight is mixed with an ethylene-vinyl a...
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Abstract
The invention discloses a preparation method of a stretchable fluorescent color-changing material. The preparation method comprises the following steps: preparing a dihydrodibenzophenazine derivative; and preparing the fluorescent color-changing doped polymer. According to the preparation method of the stretchable fluorescent color-changing material provided by the invention, the dihydrodibenzophenazine derivative has unique vibration-induced emission performance, and multiple fluorescence emission changes can be realized without complex molecular design. The dihydrodibenzophenazine derivative is simple to prepare, the doping process of the dihydrodibenzophenazine derivative, the polycaprolactone (PCL) and the ethylene-vinyl acetate copolymer (EVA) is simple, and the prepared polymer film with fluorescence emission has good reversibility. According to the stretchable fluorescent color-changing material prepared by the method disclosed by the invention, the fluorescent color-changing process from pink to blue-green can be realized through the stretching effect of external force, meanwhile, the stimulation of different fluorescent emission to external force can be calibrated, and the used raw materials are simple and easy to obtain and harmless to human bodies and environments.
Description
Technical field [0001] The present invention belongs to the technical field of fluorescent material, and more particularly to a method of preparing a stretchable fluorescent discoloration material. Background technique [0002] "Vibration Induced Emission, VIE) is a new mechanism for organic conjugate molecules, which exhibits unique luminescent properties in dihydrobenzozine derivatives. Under excitation of single-wavelength ultraviolet light, dihydrobenzine-like derivatives exhibit red and blue fluorescence in different ratios, and the emitted fluorescence wavelength can vary with the viscosity and temperature of the environment, this Fluorescence emission characteristics have been widely used in multi-domain research, such as organic photoelectric materials, ratios fluorescent probes, and super molecular gels. [0003] The stretch fluorescent discoloration material is a new type of functional material that changes in fluorescent emissions due to the irritation of the external ...
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