Near-infrared-II metal-organic frameworks enable real-time imaging of inflammatory bowel disease

Diagnostic clarity in deep-tissue imaging is often limited by the scattering and absorption of light within the human body. By engineering a donor-acceptor-donor organic linker, researchers have synthesized a new metal-organic framework (MOF), designated HIAM-4030, which achieves maximal fluorescence emission at 1052 nm. This wavelength falls within the near-infrared-II (NIR-II) window, where biological tissues are more transparent, allowing for higher resolution and deeper penetration than standard imaging techniques.

Beyond its utility as a contrast agent, the framework’s ftw topology allows it to function as a therapeutic vehicle. In preclinical tests focusing on inflammatory bowel disease, the HIAM-4030-based nanocomposite demonstrated a dual-purpose capability: the targeted delivery of anti-inflammatory agents alongside real-time, noninvasive visualization of the treatment area. This integration of diagnostics and therapeutics into a single luminescent MOF suggests a shift toward more precise monitoring of chronic internal inflammatory conditions, where traditional colonoscopy or biopsy may be invasive or offer only periodic data points.