Rare earth polyacid, organic light active molecule and layered double hydroxides composite luminous thin film and preparation method thereof

Abstract

The invention relates to a rare earth polyacid, organic light active molecule and layered double hydroxides composite luminous thin film and a preparation method thereof, and belongs to the technical filed of organic and inorganic composite luminous thin films. The method comprises the following steps of firstly, preparing a layered double hydroxides gel solution stripped by a formamido solution; respectively preparing rare earth polyacid and an organic molecule water solution; and using a hydrophilic substrate to carry out several times of alternative assembly in three solutions in a certain sequence to obtain the double-color organic and inorganic composite luminous thin film. The thickness of the thin film is accurately controllable at nano level, and the luminous strength is controllable through changing the number of assembly layers.

Description

technical field

[0001] The invention belongs to the technical field of organic-inorganic composite luminescent films, and particularly relates to a composite luminescent film of rare earth polyacids, organic photoactive molecules and hydrotalcite and a preparation method thereof. Background technique

[0002] Polyoxometalates (polyoxometalates, abbreviated as POMs) are usually called polyacids, also known as metal-oxygen clusters, which are composed of pre-transition metal elements (Mo, W, V, Nb, Ta, etc.) Metal-oxygen cluster compounds formed by oxygen linkage. The condensation of the same oxoacid ion is called the same polyanion (such as MoO 4 2- →Mo 7 o 24 6- , WO 4 2- →W 7 o 24 6- ), its acid is called isopoly acid. There are different kinds of oxyacid ions formed by condensation called heteropolyanions (WO 4 2- +PO 4 3- →PW 12 o 40 3- ), its acid is called heteropolyacid, H 3 PW 12 o 40 It is the classic heteropoly acid-12-tungstophosphoric acid. D...

Examples

Embodiment 1

[0029] 1. Preparation of hydrotalcite precursor with nitrate between layers by ion exchange method:

[0030] a, 0.02mol (5.13g) of solid Mg (NO 3 ) 2 ·6H 2 O and 0.01mol (3.75g) of solid Al(NO 3 ) 3 9H 2 O, and 0.026mol (3.645g) of solid hexamethylenetetramine (HMT) were dissolved in 80ml of water, then the mixed solution was placed in a reaction kettle, reacted at 140°C for 24h, then suction filtered, and washed with a large amount of deionized water Washing, and finally drying in an oven at 100°C, to obtain magnesium aluminum carbonate intercalated hydrotalcite Mg 2 Al-CO 3 -LDH.

[0031] b, 1mol (85g) of solid NaNO 3 Dissolve in 1000ml of water, add 3.3mmol (0.236ml) of concentrated nitric acid, and finally add 1.0g of the above Mg 2 Al-CO 3 -LDH sample was added to the reaction vessel, stirred vigorously under the protection of nitrogen, reacted at room temperature for 48 hours, filtered with suction, washed with a large amount of deionized water, and dried in va...

Embodiment 2

[0038] Repeat steps (1)-(5) of Example 1;

[0039] (6) Blow dry the treated substrate with nitrogen, immerse in solution A for 10 minutes, soak in deionized water for 2 minutes, blow dry with nitrogen, then immerse in solution B for 10 minutes, soak in deionized water for 2 minutes, use Blow dry with nitrogen to obtain 1 layer of (EuW 10 / LDH)UTF, then alternately immersed in solution A and solution C, repeated twice to obtain [(EuW 10 / LDH) 1 / (BNMAPVS / LDH) 2 ] 1 UTFs (the cycle once can be abbreviated as (EuW 10 / LDH) 1 / (BNMAPVS / LDH) 2 UTFs). Repeat the above steps x times to get [(EuW 10 / LDH) 1 / (BNMAPVS / LDH) 2 ] x UTFs (x=1-10).

Embodiment 3

[0041] Repeat steps (1)-(5) of Example 1;

[0042] (6) Blow dry the treated substrate with nitrogen, soak in solution A for 10 minutes, soak in deionized water for 2 minutes, blow dry with nitrogen, then immerse in solution B for 10 minutes, soak in deionized water for 2 minutes, Blow dry with nitrogen, repeat this step twice to get (EuW 10 / LDH) 2 UTFs. Then alternately immerse in solution A and solution C to obtain (EuW 10 / LDH) 2 / (BNMAPVS / LDH) 1 UTFs. Repeat the above steps x times to get [(EuW 10 / LDH) 2 / (BNMAPVS / LDH) 1 ] x UTFs (x=1-10).

technical field

[0001] The invention belongs to the technical field of organic-inorganic composite luminescent films, and particularly relates to a composite luminescent film of rare earth polyacids, organic photoactive molecules and hydrotalcite and a preparation method thereof. Background technique

[0002] Polyoxometalates (polyoxometalates, abbreviated as POMs) are usually called polyacids, also known as metal-oxygen clusters, which are composed of pre-transition metal elements (Mo, W, V, Nb, Ta, etc.) Metal-oxygen cluster compounds formed by oxygen linkage. The condensation of the same oxoacid ion is called the same polyanion (such as MoO 4 2- →Mo 7 o 24 6- , WO 4 2- →W 7 o 24 6- ), its acid is called isopoly acid. There are different kinds of oxyacid ions formed by condensation called heteropolyanions (WO 4 2- +PO 4 3- →PW 12 o 40 3- ), its acid is called heteropolyacid, H 3 PW 12 o 40 It is the classic heteropoly acid-12-tungstophosphoric acid. D...

Examples

Embodiment 1

[0029] 1. Preparation of hydrotalcite precursor with nitrate between layers by ion exchange method:

[0030] a, 0.02mol (5.13g) of solid Mg (NO 3 ) 2 ·6H 2 O and 0.01mol (3.75g) of solid Al(NO 3 ) 3 9H 2 O, and 0.026mol (3.645g) of solid hexamethylenetetramine (HMT) were dissolved in 80ml of water, then the mixed solution was placed in a reaction kettle, reacted at 140°C for 24h, then suction filtered, and washed with a large amount of deionized water Washing, and finally drying in an oven at 100°C, to obtain magnesium aluminum carbonate intercalated hydrotalcite Mg 2 Al-CO 3 -LDH.

[0031] b, 1mol (85g) of solid NaNO 3 Dissolve in 1000ml of water, add 3.3mmol (0.236ml) of concentrated nitric acid, and finally add 1.0g of the above Mg 2 Al-CO 3 -LDH sample was added to the reaction vessel, stirred vigorously under the protection of nitrogen, reacted at room temperature for 48 hours, filtered with suction, washed with a large amount of deionized water, and dried in va...

Embodiment 2

[0038] Repeat steps (1)-(5) of Example 1;

[0039] (6) Blow dry the treated substrate with nitrogen, immerse in solution A for 10 minutes, soak in deionized water for 2 minutes, blow dry with nitrogen, then immerse in solution B for 10 minutes, soak in deionized water for 2 minutes, use Blow dry with nitrogen to obtain 1 layer of (EuW 10 / LDH)UTF, then alternately immersed in solution A and solution C, repeated twice to obtain [(EuW 10 / LDH) 1 / (BNMAPVS / LDH) 2 ] 1 UTFs (the cycle once can be abbreviated as (EuW 10 / LDH) 1 / (BNMAPVS / LDH) 2 UTFs). Repeat the above steps x times to get [(EuW 10 / LDH) 1 / (BNMAPVS / LDH) 2 ] x UTFs (x=1-10).

Embodiment 3

[0041] Repeat steps (1)-(5) of Example 1;

[0042] (6) Blow dry the treated substrate with nitrogen, soak in solution A for 10 minutes, soak in deionized water for 2 minutes, blow dry with nitrogen, then immerse in solution B for 10 minutes, soak in deionized water for 2 minutes, Blow dry with nitrogen, repeat this step twice to get (EuW 10 / LDH) 2 UTFs. Then alternately immerse in solution A and solution C to obtain (EuW 10 / LDH) 2 / (BNMAPVS / LDH) 1 UTFs. Repeat the above steps x times to get [(EuW 10 / LDH) 2 / (BNMAPVS / LDH) 1 ] x UTFs (x=1-10).

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