Luminol Sentezi

3-Nitroftalik asitten kemilüminesans bileşik elde etme

Organic Synthesis Professional (Lab) 120 dak ~$30,00

Hedef

Luminol (3-aminoftaloidrazit) sentezlemek ve hidrojen peroksit ile kemilüminesans tepkimesini göstermek.

Arka Plan

Luminol is a chemiluminescent compound used in forensic science to detect trace amounts of blood. It is synthesized by reacting 3-nitrophthalic acid with hydrazine, followed by reduction of the nitro group with sodium dithionite. When oxidized by hydrogen peroxide in the presence of a catalyst, luminol emits blue light.

Güvenlik Uyarıları

  • Hydrazine is toxic and a suspected carcinogen — handle with extreme care in fume hood
  • Sodium dithionite generates SO₂ — use in fume hood
  • NaOH is corrosive
  • Wear nitrile gloves and goggles throughout

Gerekli KKD

goggles gloves lab_coat

Malzemeler

  • 3-Nitrophthalic acid (1 g)
  • Hydrazine hydrate (10%) (3 mL)
    Toxic
  • Triethylene glycol (5 mL)
    High-boiling solvent
  • Sodium dithionite (Na₂S₂O₄) (3 g)
    Reducing agent
  • Sodium hydroxide (NaOH) (5 mL)
    10% solution
  • Hydrogen peroxide (H₂O₂) (10 mL)
    3% for chemiluminescence test
  • Potassium ferricyanide (0.1 g)
    Catalyst for glow test

Ekipman

Round-bottom flask (50 mL) Reflux condenser Hot plate Buchner funnel Filter flask Darkened room Test tubes

Prosedür

1

Dissolve 1 g 3-nitrophthalic acid in 5 mL triethylene glycol in the round-bottom flask. Heat to 100°C.

5 dak Fume hood required
2

Add 3 mL of 10% hydrazine hydrate. Attach the reflux condenser and heat at 130-140°C for 30 minutes.

35 dak Hydrazine is toxic — fume hood essential
3

Cool the mixture. Add 15 mL hot water and 3 mL 10% NaOH.

5 dak
4

Add 3 g sodium dithionite to reduce the nitro group. Heat at 80°C for 10 minutes.

12 dak SO₂ released — fume hood
5

Acidify the solution with glacial acetic acid until luminol precipitates.

5 dak
6

Collect the luminol by vacuum filtration. Wash with cold water and dry.

10 dak
7

Test chemiluminescence: dissolve a small amount of luminol in 5 mL of dilute NaOH. In a darkened room, add H₂O₂ and a trace of potassium ferricyanide.

5 dak
8

Observe the blue glow. Record intensity and duration.

3 dak

Beklenen Sonuçlar

A pale yellow solid (luminol). When tested with H₂O₂ and ferricyanide catalyst in a dark room, an intense blue chemiluminescent glow should last for 15-30 seconds. The glow confirms successful synthesis.

Temizlik

Dispose of hydrazine waste in designated hazardous waste container. Neutralize acids and bases. Rinse all glassware thoroughly. Decontaminate work area.

Ayrıntılar

Kategori
Organic Synthesis
Zorluk
Professional (Lab)
Süre
120 dak
Tahmini Maliyet
$30,00
Adımlar
8
Malzemeler
7

Daha Fazla Deney

Aldol Kondenzasyonu (Dibenzalaseton) 75 min Asetaminofen (Parasetamol) Sentezi 80 min Aspirin (Asetilsalisilik Asit) Sentezi 90 min Bitkisel Yağdan Biyodizel Üretimi 60 min Çaydan Kafein Ekstraksiyonu 90 min Etil Asetatın Fischer Esterifikasyonu 90 min Muz Aroması (İzoamil Asetat) Sentezi 90 min Naylon 6,10 Yapımı (Naylon İp Hilesi) 30 min Sabunlaşma ile Sabun Yapımı 60 min Sümüklü Oyun Hamuru Sentezi (Çapraz Bağlı PVA) 20 min

Frequently Asked Questions

What is the objective of Luminol Sentezi?
Luminol (3-aminoftaloidrazit) sentezlemek ve hidrojen peroksit ile kemilüminesans tepkimesini göstermek.
How difficult is Luminol Sentezi?
This experiment is rated as Professional (Lab). It takes approximately 120 minutes to complete.
What safety precautions are needed for Luminol Sentezi?
Key safety precautions include: Hydrazine is toxic and a suspected carcinogen — handle with extreme care in fume hood; Sodium dithionite generates SO₂ — use in fume hood; NaOH is corrosive.
What materials are needed for Luminol Sentezi?
The main materials required are: 3-Nitrophthalic acid, Hydrazine hydrate (10%), Triethylene glycol, Sodium dithionite (Na₂S₂O₄), Sodium hydroxide (NaOH).
What results should I expect from Luminol Sentezi?
A pale yellow solid (luminol). When tested with H₂O₂ and ferricyanide catalyst in a dark room, an intense blue chemiluminescent glow should last for 15-30 seconds. The glow confirms successful synthesis.