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@ARTICLE{CarboniMarri:642168,
      author       = {Carboni Marri, Sara and Monico, Letizia and Rossi,
                      Francesca and Miliani, Costanza and Vivani, Riccardo and
                      Janssens, Koen and De Meyer, Steven and Mathon, Olivier and
                      Cotte, Marine and Burghammer, Manfred and Garrevoet, Jan and
                      Falkenberg, Gerald and Avranovich Clerici, Ermanno and
                      Rios-Casier, Annelies and Van der Snickt, Geert and Romani,
                      Aldo},
      title        = {{D}iscovering the dual degradation pathway of emerald green
                      in oil paints: {T}he effects of light and humidity},
      journal      = {Science advances},
      volume       = {11},
      number       = {47},
      issn         = {2375-2548},
      address      = {Washington, DC [u.a.]},
      publisher    = {Assoc.},
      reportid     = {PUBDB-2025-05381},
      pages        = {eady1807},
      year         = {2025},
      abstract     = {Emerald green, a copper acetoarsenite pigment, enriched the
                      19th-century and 20th-century artists’ palettes andcaused
                      darkening and fragilities in paintings. The accepted
                      alteration mechanism involves the oxidation of triar-senite
                      ions [(As3O6)3−] to arsenates (AsO43−), although
                      questions about the promoting factors and the origin ofthe
                      oxidized arsenic remain unanswered. This study investigates
                      the primary environmental parameters inducingalteration in
                      the oil binder and elucidates the associated degradation
                      pathways through a multiscale analyticalapproach, including
                      noninvasive spectroscopic techniques and synchrotron
                      radiation–based x-ray methods. Bycombining results from a
                      historical oil painting by James Ensor (1860 to 1949) and
                      artificially aged paint mock-ups, we identified ultraviolet
                      A–visible light and humidity (relative humidity ≥
                      $95\%)$ as key driving factors, induc-ing a dual degradation
                      pathway: Light promotes surface-stratified arsenic oxidation
                      (As3+ →→ As5+) resulting inamorphous As5+- rich
                      compounds, whereas a dark, high moisture environment favors
                      arsenolite (As₂O₃) crystalli-zation. In addition, a
                      noninvasive analytical strategy is proposed for monitoring
                      the conservation state of emeraldgreen paints in historical
                      artworks.},
      cin          = {DOOR ; HAS-User / FS-PETRA-S},
      ddc          = {500},
      cid          = {I:(DE-H253)HAS-User-20120731 /
                      I:(DE-H253)FS-PETRA-S-20210408},
      pnm          = {631 - Matter – Dynamics, Mechanisms and Control
                      (POF4-631) / 6G3 - PETRA III (DESY) (POF4-6G3)},
      pid          = {G:(DE-HGF)POF4-631 / G:(DE-HGF)POF4-6G3},
      experiment   = {EXP:(DE-H253)P-P06-20150101},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1126/sciadv.ady1807},
      url          = {https://bib-pubdb1.desy.de/record/642168},
}