4 research outputs found
Self-assembly of three cationic silver(I) coordination networks with flexible bis(pyrazolyl)-based linkers
No full textThree new cationic silver(I) coordination polymers, {[Ag(mu-bpmb)](SO3CF3)}n (1), {[Ag(mu-bdb)1.5] (SO3CF3)}n (2) and {[Ag(mu-bpb)2](NO3)}n (3), with flexible 1,4-bis[(pyrazolyl)methyl]benzene (bpmb), 1,4-bis[(3,5-dimethylpyrazolyl)methyl]benzene (bdb), and 1,4-bis(pyrazolyl)butane (bpb) have been prepared at room temperature by the solvent layering method. The three compounds were characterized by FT-IR spectroscopy, PXRD, elemental analyses and single-crystal X-ray diffraction. Compound 1 is a highly undulated polymeric 1D chain in which the silver ions adopt a linear geometry, coordinating two bpmb linkers. Compounds 2 and 3 are both 2D coordination polymers with their silver atoms being three and four coordinated, and resulting in 6^3-hcb and 4^4-sql underlying net topologies, respectively. The flexible bispyrazolyl ligands display various conformations in the solid state, causing the formation of different Ag. . .Ag separations in the polymeric structures
Anion-directed assembly of three cationic silver(I) coordination polymers with bis(imidazolyl)-based linker: Structural characterization and anion exchange study
No full textLegitimacy in the Literature: Distinguishing Between Perceived and Actual Value Congruence in Carbon Reduction Initiatives
No full text\ua9 2025 The Author(s). Business Strategy and the Environment published by ERP Environment and John Wiley & Sons Ltd.Academic and social concerns regarding the management of carbon emissions are pressing due to the importance of carbon reduction in the fight against climate change and the strategic implications of the various approaches. In particular, the relationship between carbon reduction and legitimacy has received significant attention, with academics noting both the positive relationship between the two and the risk of ‘greenwashing’. Here, we review the extant literature on carbon reduction and legitimacy, presenting insights into the current academic discourse and highlighting an important distinction between ‘legitimacy’ as it relates to perception and ‘legitimacy’ as it relates to actual congruence between the actions of the company and social expectations. Our review demonstrates that legitimacy as perception is the dominant application of the concept in the literature, and we highlight the importance of more academic consideration of the way in which companies\u27 carbon reduction efforts actually cohere with relevant norms and values
Early Outcomes of Endovascular Repair of Aortic Arch Lesions in Zone 0/1 With a Thoracic Branched Endoprosthesis
No full textObjective: The pivotal trial 30-day outcomes of the GORE TAG Thoracic Branch Endoprosthesis in patients with endovascular repair of the aortic arch or descending thoracic aorta using a zone 0 or 1 landing zone were evaluated.
Methods: In this nonrandomized, multicenter, prospective study, the primary, clinically driven outcome was a composite of the following through 1 month: technical success (successful device deployment with maintenance of side-branch patency and the absence of aortic rupture), lesion-related mortality, disabling stroke, permanent paraplegia or paraparesis, new onset renal failure requiring permanent dialysis, and protocol-defined unanticipated reintervention.
Results: The 77 study patients enrolled had aneurysm (n = 50), dissection (n = 24), or other isolated lesion types (n = 3); 90.9% of cases used a zone 0 proximal landing zone. Patients had a mean age of 70.8 ± 10.8 years; 66.2% were male and 57.1% White. All patients had both the aortic and side branch (SB) components implanted; 53 (68.8%) had a GORE TAG Conformable Thoracic Stent Graft distal extension, 20 (26.0%) required more than one device, and 6 (7.8%) had a proximal aortic extender. A single GORE TAG Thoracic Branch Endoprosthesis SB was implanted in 55 patients (71.4%), and 22 (28.6%) required more than one SB device. Technical success was achieved in 73 of 77 patients (94.8%); access site complications occurred in 4 patients. Of the patients with imaging, 77.8% (56 of 72) had successful aneurysm or primary entry tear exclusion (dependent on treated pathology) and were free from clinically evident stroke or other adverse outcomes at 30 days. In 16 of 72 patients, protocol-defined major adverse events included 3 (3.9%) lesion-related deaths, 6 (7.8%) strokes (1 died and 5 were with neurologic sequelae persistent at the 30-day cutoff), 4 (5.2%) unplanned additional procedure, and 1 renal failure. Four (6.0%) patients had type I or type III endoleak. There were no aortic ruptures or permanent paraplegia or paraparesis.
Conclusions: This early experience pivotal trial demonstrates that repair of aortic arch pathology using a single SB endograft requiring proximal zone 0/1 placement had excellent treatment success and an acceptable level of perioperative complications in a cohort of patients deemed to be at high risk of open repair. Stroke and access site complications were the most frequent serious events and occurred more frequently in the aneurysm cohort. These initial data suggest that endovascular treatment of the arch is a suitable treatment option in appropriate patients. Longer-term follow-up will be required to establish how these results compare with open repair among similar patients
