LED Sources

Description:

The EvoluChem™ LED spotlights are designed specifically for photo-catalytic chemistry applications. They fit the photoredox box and they are designed to irradiate all samples with maximum efficiency. The LED chips are selected for specific wavelengths 365 nm, 405 nm, 425 nm, 455 nm, 475 nm, 525 nm, 6200K white.

General Specifications

  • Power Consumption 18W or 30W Max
  • Input Voltage 100-240 VAC
  • Beam Angle 25°
  • Wavelength Options365 nm, 380 nm, 405 nm, 455 mm, 475 nm, 525 nm, 6200K white LED LG, EPILED, Cree XPE or XTE (9X)

Advantage of Focused Light Beam

18W LED EvoluChem

Light Power vs Irradiance

Although the total power of LED light is important, it is essential to estimate the amount of light that actually goes on the sample. If the light is spread over a large area the density of light (irradiance) on sample will be little. Therefore we designed the EvoluChemTM LEDs to focus the light toward the samples. They have light beam angle of  25° which allows to obtain better light efficiency than the Kessil light (40°).

With a more focused beam the Evoluchem LED 18W average irradiance is 50% higher than a 34W Kessil light.

 

Light Sources Electric
Power (W)
Total
Irradiance*
(mW/cm2)
Kessil 150N 34W 22
P201-18-2 450-455 nm 18W 34
P303-30-1 450-455 nm 30W 55

 

Experimental Details:
In duplicate in a 4-ml vial equipped with a teflon septa and 2x7 mm stir bar, were weighed 4-bromoacetophenone (4.95 mg, 25 µmol) and potassium benzyltrifluoroborate (4.50 mg, 25 µmol, 1 equiv.). To this vial was added a 1.0 ml solution in DMA containing NiCl2-dme (1.1 mg, 5 µmol, 20 mol %), dtbbpy (1.3 mg, 5 µmol, 20 mol %) and Ir(dF-CF3-ppy)2(dtbpy) (1.12 mg, 1 µmol, 4 mol %) followed by addition of 2,6-lutidine (17.5 µl, 150 µmol, 6 equiv.) . The solution was sparged with nitrogen via submerged needle for 5 minutes and vial was placed in EvoluChem photoreactor with blue Kessil 34W LED or with a EvoluChem LED 18W 450-455 nm. Reaction time course was monitored at 0, 5, 15, 45, 120, 240, and 360 minutes.  Molander_Lutidine

 

18W_Kessil_Graph Light Spectrum
EvoluChem LED SpectrumHCK1012-01-008EvoluChem  LED 30WHCK1012-01-008  

 

LED18W-1

EvoluChem  LED 18W

 

Light Sources Wavelength LED Relative Irradiance* Part Number
 P205-18-1 365 nm 18W 365 nm LG/CREE 9 mW/cm2 HCK1012-01-011
 P205-18-1 380 nm 18W 380 nm LG 8 mW/cm2 HCK1012-01-013
 P206-18-1 405 nm 18W 405 nm LG 28 mW/cm2 HCK1012-01-010
 P207-18-1 425 nm 18W 425 nm EPILED 33 mW/cm2 HCK1012-01-012
 P201-18-2 450 nm 18W 450 nm CREE XPE 34 mW/cm2 HCK1012-01-002
 P202-18-1 475 nm 18W 475 nm CREE XPE 23 mW/cm2 HCK1012-01-003
 P203-18-1 525 nm 18W 525 nm CREE XPE 10 mW/cm2 HCK1012-01-004
 P204-18-1 6200K 18W Cold White CREE XTE 29 mW/cm2 HCK1012-01-005
 P303-30-1 450 nm 30W 450 nm CREE XPE 55 mW/cm2 HCK1012-01-008
 P301-30-1 365 nm 30W 365 nm LG 25 mW/cm2 HCK1012-01-006

*Average relative irradiance is measured in the photoredox box.

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