@article{HaenselBartaRietzeetal.2018,
  author    = {H{\"a}nsel, Marc and Barta, Christoph and Rietze, Clemens and Utecht, Manuel Martin and Rueck-Braun, Karola and Saalfrank, Peter and Tegeder, Petra},
  title     = {Two-Dimensional Nonlinear Optical Switching Materials},
  series = {The journal of physical chemistry : C, Nanomaterials and interfaces},
  volume    = {122},
  journal   = {The journal of physical chemistry : C, Nanomaterials and interfaces},
  number    = {44},
  publisher = {American Chemical Society},
  address   = {Washington},
  issn      = {1932-7447},
  doi       = {10.1021/acs.jpcc.8b08212},
  pages     = {25555 -- 25564},
  year      = {2018},
  abstract  = {Combining photochromism and nonlinear optical (NLO) properties of molecular switches-functionalized self-assembled monolayers (SAMs) represents a promising concept toward novel photonic and optoelectronic devices. Using second harmonic generation, density functional theory, and correlated wave function methods, we studied the switching abilities as well as the NLO contrasts between different molecular states of various fulgimide-containing SAMs on Si(111). Controlled variations of the linker systems as well as of the fulgimides enabled us to demonstrate very efficient reversible photoinduced ring-opening/closure reactions between the open and closed forms of the fulgimides. Thus, effective cross sections on the order of 10(-18) cm(-2) are observed. Moreover, the reversible switching is accompanied by pronounced NLO contrasts up to 32\%. Further molecular engineering of the photochromic switches and the linker systems may even increase the NLO contrast upon switching.},
  language  = {en}
}
@article{FoellerMahmudQadrietal.2010,
  author    = {Foeller, Michael and Mahmud, Hasan and Qadri, Syed M. and Gu, Shuchen and Braun, Manuel and Bobbala, Diwakar and Hocher, Berthold and Lang, Florian},
  title     = {Endothelin B receptor stimulation inhibits suicidal erythrocyte death},
  issn      = {0892-6638},
  doi       = {10.1096/Fj.10-159483},
  year      = {2010},
  abstract  = {Endothelins (ETs), potent endothelium-derived mediators, stimulate formation of nitric oxide, which, in turn, protects against suicidal erythrocyte death or eryptosis, characterized by phosphatidylserine exposure at the erythrocyte surface and triggered by increase in cytosolic Ca2+ ([Ca2+](i)). The present study explored whether the ET1- receptor ETB influences suicidal erythrocyte death. To this end, [Ca2+](i) (Fluo3-fluorescence) and phosphatidylserine exposure (annexin V-binding) were determined utilizing FACS analysis. Energy depletion increased [Ca2+]i and phosphatidylserine-exposure, effects significantly blunted by ET1 (IC50 approximate to 100 nM) and the ETB receptor- agonist sarafotoxin 6c (IC50 approximate to 10 nM) but not by ET2 and ET3. ET1 and sarafotoxin significantly delayed the kinetics of suicidal erythrocyte death following energy depletion. ETB stimulation did not blunt the effect of Ca2+- ionophore ionomycin (1 mu M) on phosphatidylserine exposure. The in vivo significance was tested using rescued ETB- knockout (etb(-/-)) and wild-type (etb(+/+)) mice. The number of phosphatidylserine-exposing erythrocytes, of reticulocytes and spleen size were significantly larger in etb(-/-) mice than in etb(+/+)-mice. The etb(-/-) erythrocytes were more susceptible to the eryptotic effect of oxidative stress and more rapidly cleared from circulating blood than etb(+/+) erythrocytes. Finally, the spleens from etb(-/-) mice were enlarged and contained markedly more phosphatidylserine- exposing erythrocytes than spleens from etb(+/+) mice. The observations disclose a novel function of ET1, i. e., protection from suicidal erythrocyte death.},
  language  = {en}
}
@article{SchulzeUtechtHebertetal.2015,
  author    = {Schulze, Michael and Utecht, Manuel Martin and Hebert, Andreas and R{\"u}ck-Braun, Karola and Saalfrank, Peter and Tegeder, Petra},
  title     = {Reversible Photoswitching of the Interfacial Nonlinear Optical Response},
  series = {The journal of physical chemistry letters},
  volume    = {6},
  journal   = {The journal of physical chemistry letters},
  number    = {3},
  publisher = {American Chemical Society},
  address   = {Washington},
  issn      = {1948-7185},
  doi       = {10.1021/jz502477m},
  pages     = {505 -- 509},
  year      = {2015},
  abstract  = {Incorporating photochromic molecules into organic/inorganic hybrid materials may lead to photoresponsive systems. In such systems, the second-order nonlinear properties can be controlled via external stimulation with light at an appropriate wavelength. By creating photochromic molecular switches containing self-assembled monolayers on Si(111), we can demonstrate efficient reversible switching, which is accompanied by a pronounced modulation of the nonlinear optical (NLO) response of the system. The concept of utilizing functionalized photoswitchable Si surfaces could be a way for the generation of two-dimensional NLO switching materials, which are promising for applications in photonic and optoelectronic devices.},
  language  = {en}
}