UV, Visible, and NIR measurements up to 2500 nm for MCD and specialized applications.
The J-1700 was specifically designed for more demanding near-infrared CD applications. In addition to the enhanced far-UV capabilities, researchers probing the chiral activity of molecules in the NIR spectral region now have the ability to obtain data at wavelengths up to 2500 nm
The InGaAs detector has a wavelength range from 900-2500 nm, while the PMT ranges from 163-960 nm. The automatic detector interchange allows researchers to obtain both far-UV and NIR measurements without having to manually switch detectors. The addition of a grating monochromator to the double-prism monochromator setup provides low stray light and high light intensity, generating CD signals with high S/N performance throughout a large spectral range.
NIR-CD applications vary from conformational and chirality studies of metal coordination complexes to tuning chiral properties of nanomaterials. Additionally, Magnetic Circular Dichroism (MCD) can be used in conjunction with NIR-CD to probe a chromophore’s electronic structure as well as to induce chirality in compounds.
● Wavelength range 163-2500 nm
● Low stray light
● Simultaneous Multi-Probe (SMP): CD, LD, fluorescence, UV-visible, absorbance
● Integrated Hg lamp for wavelength calibration
● Three scanning modes: auto, step and continuous
● Highly efficient nitrogen purge system: low volume monochromator designed using a flow simulator
Enhanced Vacuum-UV Measurement
α-pinene enantiomers (gas phase) showing excellent performance in the Far-UV region.
CD spectra of Human Serum Albumin (Helix rich), Concanavalin A (β-sheet rich) and Trypsin inhibitor (Random rich) in water with excellent signal to noise to 174 nm.
The same α-pinene sample showing similar superior performance in the vacuum-UV region down to 163 nm.
The only CD instrument designed to explore the structure and stability of biomolecules by providing the maximum signal-to-noise under highly absorbing, low light intensity conditions of the far-UV spectral region.
Unlike some detectors which only provide good signal-to-noise for low absorbing materials, the J-1000 Series circular dichroism spectrophotometers use high dynamic range detectors to obtain high quality spectra of samples with excellent signal-to-noise, especially for highly absorbing materials found in the far-UV.