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Related Concept Videos

Special considerations while measuring oxygen saturation01:19

Special considerations while measuring oxygen saturation

Assessing respiratory rate concurrently with pulse measurement is fundamental to patient care, providing valuable insights into the patient's respiratory function. The normal breathing rate for an adult usually falls within a normal range of 12 to 20 breaths per minute. Abnormal respiratory rates can signal underlying health conditions or the need for immediate intervention.
Ensuring accuracy in vital sign recordings while prioritizing patient comfort and minimizing anxiety is important. 
Testing Water Quality01:14

Testing Water Quality

When the quality of water for concrete preparation is uncertain, its impact on the setting time of cement and compressive strength of mortar is assessed by comparison with de-ionized or distilled water benchmarks. American Society for Testing and Materials (ASTM) C1602 requires the setting times to be within 90 minutes of the control, British Standard (BS) 3146:1980 allows a 30-minute variance in the initial setting, while British Standards European Norm (BS EN) 1008 specifies initial setting...
Guidelines For Measuring Vital Signs01:19

Guidelines For Measuring Vital Signs

Following these guidelines can help nurses accurately measure vital signs, assess changes in patient conditions, and provide timely treatment when necessary. Adhering closely to the guidelines ensures the accuracy and reliability of the results.
Before taking a patient's vital signs, a nurse would consider and assess the patient's comfort level and ensure appropriate equipment is available.
Amperometry: Overview01:10

Amperometry: Overview

Amperometry is a technique commonly used to measure the concentration of specific analytes in a solution by monitoring the electric current generated during an electrochemical reaction. It involves applying a constant potential between a working electrode and a reference electrode to measure the resulting current, which is proportional to the concentration of the analyte. The Clark oxygen electrode operates based on this principle of amperometry. It consists of a cathode and an anode enclosed...
Pulse Oximetry01:24

Pulse Oximetry

Pulse oximetry, or SpO2, is a non-invasive method for continuously monitoring arterial oxygen saturation (SaO2). This procedure involves attaching a probe or sensor to the patient's fingertip, forehead, earlobe, or nose bridge. The sensor works by detecting changes in oxygen saturation levels through light signals generated by the oximeter and reflected by the pulsing blood under the probe.
Purpose
Average SpO2 values are greater than 95%. If the readings fall below 90%, it indicates that...

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Updated: Jun 14, 2026

Luminescence Lifetime Imaging of O2 with a Frequency-Domain-Based Camera System
08:35

Luminescence Lifetime Imaging of O2 with a Frequency-Domain-Based Camera System

Published on: December 16, 2019

Water-based oxygen-sensor films.

Arezoo Habibagahi1, Youssef Mébarki, Yasir Sultan

  • 1Ottawa-Carleton Chemistry Institute, Carleton University, Ottawa, Ontario K1S 5B6, Canada.

ACS Applied Materials & Interfaces
|April 2, 2010
PubMed
Summary
This summary is machine-generated.

Researchers developed novel oxygen-sensor films using luminescent iridium complexes and eco-friendly polymers. These sensors demonstrate high sensitivity and stability, offering a sustainable alternative for oxygen detection applications.

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Luminescence Lifetime Imaging of O2 with a Frequency-Domain-Based Camera System
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Area of Science:

  • Materials Science
  • Photochemistry
  • Sensor Technology

Background:

  • Cyclometalated iridium complexes exhibit luminescence suitable for sensing applications.
  • Functionalized polymers offer platforms for immobilizing luminescent materials.
  • Developing environmentally friendly oxygen sensors is crucial for various industries.

Purpose of the Study:

  • To synthesize and characterize a novel luminescent cyclometalated iridium complex.
  • To immobilize the iridium complex onto a water-soluble polymer for sensor film fabrication.
  • To evaluate the performance of the resulting oxygen-sensor films.

Main Methods:

  • Synthesis and characterization of the iridium complex [Ir(fppy)(2)(t-Bu-iCN)(2)]CF(3)SO(3) (1) using X-ray crystallography and spectroscopy.
  • Immobilization of complex 1 onto Silamine D208-EDA via reductive amination to form complex 2.
  • Fabrication of oxygen-sensor films using blends of complex 2, Silamine, and microcrystalline cellulose (MC); characterization of oxygen and temperature sensitivity using luminescence spectroscopy.

Main Results:

  • The synthesized iridium complex 1 was successfully functionalized onto a polymer to create complex 2 with comparable luminescence properties to model complexes.
  • Oxygen-sensor films prepared with complex 2, Silamine, and MC exhibited Stern-Volmer kinetics and high oxygen sensitivity (0.502 at 0.007-45 psi).
  • The optimal film composition (1:1 Silamine:MC) showed good temperature stability (-1.1 to -1.4% per °C) and luminescence microscopy revealed association of the complex with MC.

Conclusions:

  • Novel, environmentally friendly oxygen-sensor films were successfully prepared using luminescent iridium complexes immobilized on polymers.
  • The sensor performance is tunable via the polymer:cellulose ratio, with optimal sensitivity linked to reduced oxygen diffusion.
  • These materials represent a promising, sustainable alternative for oxygen detection technologies.