LED Light Sources:
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.
- 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.
|P201-18-2 450-455 nm||18W||34|
|P303-30-1 450-455 nm||30W||55|
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.
EvoluChem LED 30WHCK1012-01-008
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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