Color Anti
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Transcript of Color Anti
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COLORANTICOLORANTI
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CuloareCuloare Lungime de undaLungime de unda
violet 400-420 nm
indigo 420-440 nm
albastru 440-490 nm
verde 490 – 570 nm
galben 570 – 585 nm
orange 585- 620 nm
rosu 620-780 nm
![Page 3: Color Anti](https://reader035.fdocumente.com/reader035/viewer/2022081419/5537a9fd5503469f338b45dd/html5/thumbnails/3.jpg)
Colorant = substanta care absoarbe in domeniul vizibil si apare colorata in culoarea complementara
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Energie suficienta pentru ase excita electroni
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Conjugarea micsoreaza diferenta intre HOMO si LUMO
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Beta - carotene
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ColorantiColoranti – sistem cromofor – legaturi duble conjugate, grupa nitrozo (NO)
grupa diazo (–N=N-), carbonil (>C=O), tiocarbonil (>C=S)
- grupe auxocrome – ( donoare de electroni, respingatoare de e-)- inchidere si intensificare a culorii- NH2, -NH-R, -OH, - OR
Legea Lambert -Beer
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Exemple de coloranti naturaliExemple de coloranti naturali
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Ar N N ] X- +
Yn
pH NNAr
YnD C
Coloranti Coloranti azoiciazoici
Y = OH, pH bazicY =NH2, pH = 4-4,5
H+
Galben ( absoarbe indigo-albastru, 425nm)
Rosu(verde-albastru, 490 nm)
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HO
SO3Na
NaO3S N=N
SO3Na
OH
NaO3S N=N
SO3Na
HO
SO3Na
NaO3S N=N
NaO3S
Azorubina E122 Amarant E123
Ponceau 4R E124
C
O
COONaI
I
I I
ONaO
Eritrozina E127
HO
SO3Na
N=NNaO3S
OCH3
H3C
Rosu Ac E129
N=N
SO3Na
OH
NaO3S
NHCOCH3
Rosu 2G E128
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SO3Na
N=NNaO3S N=N
NaO3S SO3Na
NHCOCH3HO
Negru brilliant BN
NaO3S N=N N=N SO3Na
CH2OH
HO
OHBrun HT
(D1C1)C2
D1CD1
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Rosu congo
Albastru de hidroxinaftol Janus green B
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Coloranţi cu structură chinoidă
O
O
O
O
O
O
OO
p-Benzochinona o-Benzochinona 1,4-Naftochinona 1,2-Naftochinona
O
O
Antrachinonaamfi-Naftochinona 9,10-Fenantrenchinona
O
O
O O
NOH
O
NOH
NOH
- H2O
+ H2N OH
NO
O
HOHO
N2
NO
OCH3
+ CH2N2
NO
OH
NO
O
Tautomerie “benzoidă-chinoidă”
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Coloranţi indaminiciColoranţi indaminici
N NH2
H3C
H3CH
- 2[H]N NH
H3C
H3C
Amina lui Wurster
- 2[H]
N NHH3C
H3C
NCH3
CH3
NH
HH3C
H3CN N
CH3
CH3
NCH3
CH3
N
H3C
H3CN
+
Verdele lui Bindschedler
leucoderivat
chinondiimina
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Coloranţi tiaziniciColoranţi tiazinici
Albastru-metilen
NCH3
CH3
NH3C
H3CN
H2S(CH3)2N SH
N
H
2H
-2e
N(CH3)2
(CH3)2N SH
NH
N(CH3)2
H
(CH3)2N SH
N
N(CH3)2
- H
- 2e
N
S(CH3)2N N(CH3)2
N
S
H
N(CH3)2(H3C)2NAlbastru metilenleucoderivat
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Coloranţi trifenil-metanici baziciColoranţi trifenil-metanici bazici
Cristal violet
N(CH3)2
N(CH3)2
ZnCl2+
POCl3COCl2 C=O
N(CH3)2
N(CH3)2
N(CH3)2+ C
(H3C)2N N(CH3)2
N(CH3)2
OH
cetona lui Michler
C
(H3C)2N N(CH3)2
N(CH3)2] Cl
Violet cristalizat
ox.
HCl
Cristal violet
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C
NMe2+
Me2N
SO3-
CHMe2N
OH
NMe2HO3S
OH
SO3H+
H2SO4
CH
NMe2Me2N
HO3S
OH
SO3H
PbO2/HClMnO2/H2SO4
HO3S
OH
Verde acid brilliant BS
Acid RHidrolul lui Michler
E 142
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Coloranţi trifenil-metanici acizi
Fenolftaleina
O
O
O
HO OH
ZnCl2
- H2OO
O
HO OH
(H2SO4)
Fenolftaleina(forma lactoida - incolora)
Fenolftaleina(forma chinoida - rosu-violet) pH= 8 -12
C
COO-
O
-O
C
COO-
O-
O
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Fluoresceina
+
O
O
O
HO OH OHHO
ZnCl2
- H2O
O OHHO
O
O
2000C
(forma lactoida)O OHO
COOH
(forma chinoida)Fluoresceina
HO
SO3Na
NaO3S N=N
SO3Na
OH
NaO3S N=N
SO3Na
HO
SO3Na
NaO3S N=N
NaO3S
Azorubina E122 Amarant E123
Ponceau 4R E124
C
O
COONaI
I
I I
ONaO
Eritrozina E127
HO
SO3Na
N=NNaO3S
OCH3
H3C
Rosu Ac E129
N=N
SO3Na
OH
NaO3S
NHCOCH3
Rosu 2G E128
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Coloranţi antrachinonici de mordanţi
Rubia Tinctorum (purpura antică)
O
O
O
OHOH
AlCl3
O
COOH
OHOH
- H2O
O
O
OH
OH
Alizarina+
O
O
OH
OH
Histazarina
+O
COOH
OH
OH
+
Alizarina
O
O
H2SO4
O
O
SO3H
2 NaOH
O
O
OHOH
Al Al3
O
O
OH
OH
3
O
O
OH
O-
3mordant rosu-viu
aluminiu - roşu-viu; crom - violet-brună;staniu – violet-roşie
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Coloranţi antranchinonici de cadă
-coloraţi neionici, insolubili, care au proprietatea de a forma, prin reducere în mediu alcalin, săruri solubile, cu afinitate pentru fibrele de celuloză. -cColorantul insolubil se regenerează apoi pe fibră prin oxidare sau expunere la aer
Albastru-indantren
O
O
HN
NH
O
O
O
O
H2N
O
O
NH2KOH
+