Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Crystal structure and low-temperature emission of [(dmp)Cu(μ-S2butphos)2Cu(dmp)][BF4]2·6CH2Cl2 (dmp=2,9-dimethyl-1,10-phenanthroline; S2butphos=1,4-bis(diphenylphosphinesulfido)butane) (1994)
    Springer
    Journal of chemical crystallography 24 (1994), S. 753-758 
    Details
    ISSN: 1572-8854
    Keywords: Cu(I) phosphine sulfide complex ; intramolecular π-stacking ; phosphine moieties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The synthesis and crystal structure of a bimetallic luminescent Cu(I) complex containing 1,4-bis(diphenylphosphinesulfido)butane and the α-diimine 2,9-dimethyl-1,10-phenanthroline (dmp) is described. The coordination geometry about the Cu(I) center is pseudo-tetrahedral. Interplanar interactions between phenyl groups on the phosphine sulfide ligands and the phenanthroline exist which are indicative ofintramolecular π-stacking, leading to compressed S−Cu−S bond angles. The complex displays emission from a single metal-centered charge-transfer state at 77 K in a 4∶1 ethanol/methanol (v/v) glass. This is in contrast to the triphenylphosphine complex, which exhibits dual luminescence from a charge-transfer and an intraligand state at 77 K. Crystal data: triclinic, $$P\bar 1$$ ,a=13.619(4) Å,b=13.673(2) Å,c=15.384(2) Å, α=75.08(1)°, β=80.35(2)°, γ=80.67(2)°.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01666965
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Crystal structure and low-temperature emission of 2,9-dimethyl-1, 10-phenanthrolinebis(triphenylphosphinesulfide)copper(I) (1994)
    Springer
    Journal of chemical crystallography 24 (1994), S. 769-773 
    Details
    ISSN: 1572-8854
    Keywords: Synthesis ; Crystal Structure ; Cu(I) Complex ; Triphenylphosphine Sulfide ; Luminescence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The synthesis and crystal structure of a luminescent Cu(I) complex containing triphenylphosphine sulfide and the α-diimine 2,9-dimethyl-1, 10-phenanthroline (dmp) is described. The coordination geometry about the Cu(I) center is pseudo-tetrahedral. Interplanar interactions between phenyl groups on the phosphine sulfide ligands and the phenanthroline exist, but are significantly less than those previously reported for the Cu(I) triphenylphosphine analog. The complex displays emission from a single metal-centered charge-transfer state at 77K in a 4∶1 ethanol/methanol (v/v) glass. This is in contrast to the triphenylphosphine complex, which exhibits dual luminescence from a charge-transfer and an intraligand state at 77K. Crystal data: orthorhombic, P212121,a=9.4226(9) Å,b=15.757(1) Å,c=30.494(6) Å,V=4527.4(6) Å3, andR=0.053 (1021 reflections).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01668239
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    New approaches to selective pulse design (1994)
    Springer
    Magnetic resonance materials in physics, biology and medicine 2 (1994), S. 279-283 
    Details
    ISSN: 1352-8661
    Keywords: selective pulse ; inverse scattering theory ; SPINCALC ; soliton pulse ; refocusing pulse ; self-focusing pulse
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Physics
    Notes: Abstract Selective pulse design for noninteracting spins is equivalent to inversion of the Bloch equations. Until recently, few analytical solutions to this problem were known. However, approaches based on inverse-scattering theory have now led to general solutions that offer ever higher precision in meeting target responses. The concept of soliton pulses (pulses that leave the spin system unaffected) turns out to be a particularly valuable one because half-solitons (both π/2 and π pulses) are inherently phase compensated. Such pulses are important for observation of shortT 2 species, where substantial signal loss could occur in any refocusing period. Multiply-selective pulses, suitable for simultaneous suppression of several “solvent” lines have been generated by inverse-scattering theory and have considerable potential in bothin vivo magnetic resonance spectroscopy and in routine high-resolution NMR. Although analytical solutions show great promise, it is likely that optimization methods will continue to be of value for the foreseeable future. The use of the SPINCALC scheme that operates in a switched stationary reference frame is illustrated through its use to design adiabatic refocusing pulses that do not lead to cumulative errors when used in multiple-echo trains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01705253
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...